Table 12: Comparison of AUPRC (top), AUROC (middle), and Rec@K (bottom) for each model employing default hyperparameters in the fully-supervised setting. Each model is executed 10 times with varying random seeds, and the mean scores along with standard deviations are reported. Ave. denotes the average score across all 10 datasets.
AUPRC	Reddit	Weibo	Amazon	Yelp.	T-Fin.	Ellip.	Tolo.	Quest.	DGraph.	T-Social	Ave.
MLP	6.0±1.1	84.8±1.2	88.0±2.2	47.7±1.7	70.5±2.6	22.7±4.7	38.5±1.1	15.2±1.0	2.7±0.0	14.7±7.8	39.1
KNN	4.8±0.4	72.9±1.6	78.2±0.0	31.5±0.0	66.5±1.6	30.5±0.0	31.8±0.7	14.7±1.0	1.3±0.0	24.8±0.1	35.7
SVM	6.5±0.8	72.0±4.0	80.1±6.6	40.6±0.0	58.0±17.4	19.6±0.2	37.2±0.9	16.4±1.3	2.6±0.0	3.7±0.8	33.7
RF	5.3±0.6	92.0±0.8	89.7±0.4	76.3±0.3	80.6±1.3	77.3±0.4	37.7±1.1	14.3±1.0	2.5±0.0	41.0±0.1	51.7
XGBoost	5.6±0.7	95.1±0.7	91.5±0.0	82.7±0.0	79.9±1.1	77.4±0.0	38.1±1.3	15.1±0.9	2.7±0.0	15.0±0.2	50.3
XGBOD	7.5±1.4	95.0±0.4	89.4±1.6	66.3±0.4	81.1±0.6	75.9±0.0	41.3±1.2	18.4±1.7	2.0±0.0	8.2±0.0	48.5
NA	5.7±0.7	92.9±0.9	91.1±0.0	76.2±0.0	79.2±1.3	78.6±0.0	39.1±1.3	15.6±0.9	2.7±0.0	15.5±0.2	49.7
GCN	6.5±1.4	94.5±1.0	35.1±1.3	21.1±0.6	73.9±5.2	21.9±2.9	44.5±2.2	12.5±1.4	4.0±0.1	14.7±7.8	32.9
SGC	4.6±0.8	92.3±1.6	33.4±2.9	16.9±1.5	39.5±24.5	12.8±0.7	36.0±3.7	10.0±0.8	2.4±0.1	5.2±1.6	25.3
GIN	5.7±0.9	90.6±1.3	79.2±1.5	36.5±1.5	64.2±4.6	23.5±4.9	39.6±1.8	12.7±1.2	3.3±0.1	10.1±1.6	36.5
GraphSAGE	5.5±0.8	85.4±2.3	69.0±12.5	54.0±3.0	34.8±10.9	32.9±6.0	47.9±1.7	16.6±0.8	3.8±0.1	12.7±3.3	36.3
GAT	5.9±1.0	91.3±1.3	86.7±1.4	43.4±4.6	63.1±11.0	25.2±5.6	46.1±1.8	15.7±1.3	3.9±0.1	9.2±2.0	39.0
GT	5.7±0.9	88.7±1.9	80.4±4.0	55.0±5.4	31.6±14.7	25.1±4.5	47.6±1.9	15.9±1.4	3.9±0.1	9.5±2.1	36.3
PNA	5.4±0.4	93.6±0.8	42.5±8.6	30.5±0.5	28.5±12.3	27.5±4.3	42.3±1.7	11.9±0.9	3.5±0.1	26.4±7.3	31.2
BGNN	7.7±0.6	96.2±0.8	66.4±2.0	26.9±1.7	82.6±0.9	64.2±4.6	43.8±1.0	5.8±0.4	3.1±0.1	98.7±0.2	49.5
GAS	7.1±1.7	92.9±0.9	48.9±5.0	22.3±0.4	76.9±2.4	27.9±6.6	45.7±1.6	14.8±1.9	3.8±0.1	9.3±2.4	35.0
DCI	6.1±0.9	89.6±1.8	81.5±2.2	39.5±7.5	62.6±5.7	25.4±4.7	39.9±1.5	14.1±1.5	3.6±0.1	13.8±4.0	37.6
PCGNN	4.2±0.5	81.9±1.7	87.8±1.9	43.7±2.6	69.8±8.0	35.6±10.2	38.1±2.1	14.4±0.9	2.8±0.0	8.7±2.4	38.7
GATSep	6.1±1.0	90.9±2.1	87.1±1.1	54.9±2.8	70.3±11.9	26.4±4.5	46.5±2.2	16.5±1.0	3.9±0.1	10.4±1.9	41.3
BernNet	7.1±1.2	89.7±1.9	86.4±2.7	50.1±1.5	72.4±6.9	21.6±2.9	43.5±1.3	15.2±1.1	2.9±0.0	5.4±1.0	39.4
AMNet	7.3±1.0	89.7±2.2	87.3±2.1	48.8±1.3	74.3±2.5	14.7±2.9	43.2±1.2	14.6±1.2	2.8±0.0	54.9±16.5	48.2
BWGNN	6.9±1.6	93.0±1.4	89.1±1.6	55.1±1.6	86.6±0.8	26.0±3.5	49.7±1.9	16.7±1.3	4.0±0.1	54.9±16.5	48.2
GHRN	7.2±1.7	91.8±1.2	89.5±1.2	56.6±1.7	86.6±1.5	27.7±6.6	49.9±2.1	16.7±1.2	4.0±0.1	16.3±4.5	44.6
RF-Graph	5.4±0.4	97.0±0.3	91.3±0.1	76.7±0.5	89.0±0.9	77.8±0.3	49.3±1.6	14.2±1.2	2.0±0.0	93.8±0.1	59.6
XGB-Graph	5.6±0.5	97.5±0.6	92.6±0.0	87.0±0.4	89.6±0.8	78.2±0.0	48.9±1.2	15.3±0.6	3.7±0.0	92.4±0.1	61.1
AUROC	Reddit	Weibo	Amazon	Yelp, T-Fin, Ellip, Tolo, Quest, DGraph, T-Social
MLP	65.5±2.8	90.9±1.3	97.3±1.7	82.0±0.7	91.4±1.1	84.2±2.3	73.3±0.7	69.3±2.3	72.5±0.1	80.2±7.3	80.7
KNN	56.5±1.2	88.6±1.0	90.2±0.0	73.3±0.0	86.6±1.0	83.1±0.0	67.5±0.9	61.0±1.2	51.4±0.0	73.0±0.1	73.1
SVM	67.8±1.7	84.8±3.0	94.8±1.3	77.2±0.0	91.6±1.6	84.2±0.2	72.2±0.6	66.7±1.8	72.0±0.0	58.7±5.6	77.0
RF	62.0±2.8	98.7±0.2	97.2±0.3	93.3±0.1	94.2±0.5	90.1±0.9	71.7±0.8	57.6±1.6	69.1±0.1	79.0±0.1	81.3
XGBoost	61.6±3.5	99.1±0.1	97.9±0.0	95.2±0.0	94.4±0.4	91.2±0.0	73.0±0.8	57.8±1.4	71.6±0.0	81.4±0.1	82.3
XGBOD	68.6±1.6	99.1±0.1	98.3±0.3	89.4±0.4	95.0±0.3	93.0±0.0	75.2±0.8	69.3±1.3	64.9±0.2	69.2±0.0	82.2
NA	62.4±3.2	98.4±0.3	97.5±0.0	94.0±0.0	93.9±0.3	92.8±0.0	73.5±0.9	59.3±1.6	71.8±0.0	81.4±0.1	82.5
GCN	65.2±4.8	98.0±0.5	82.4±0.4	57.8±0.6	92.4±2.3	81.4±1.8	75.6±1.2	70.9±1.3	75.9±0.2	80.2±7.3	78.0
SGC	54.5±4.2	97.9±0.4	80.3±2.0	54.1±2.4	76.6±13.8	75.4±1.2	68.3±4.6	71.0±1.1	66.1±0.3	66.1±0.3	71.0
GIN	65.5±3.2	95.5±0.8	93.8±1.3	77.0±0.9	88.2±4.2	82.7±2.0	75.1±0.9	69.4±1.3	74.0±0.2	78.4±2.2	80.0
GraphSAGE	62.8±5.1	94.9±1.3	89.6±5.4	85.2±1.0	82.8±3.9	85.3±0.7	79.3±0.9	72.1±1.7	75.6±0.2	79.2±4.0	80.7
GAT	65.3±3.1	95.3±1.4	96.7±1.0	79.5±1.9	82.8±1.5	84.9±1.9	79.1±1.0	71.1±1.6	75.9±0.2	75.4±4.8	81.6
GT	63.7±4.4	95.5±1.2	92.4±2.8	84.5±2.2	81.4±6.5	85.1±1.5	79.6±0.8	70.9±1.2	75.8±0.1	72.1±3.3	80.1
PNA	64.6±1.5	97.8±0.5	83.2±4.5	74.3±0.5	74.3±12.0	84.0±1.0	75.4±1.0	71.8±0.9	73.4±0.2	78.2±11.0	77.7
BGNNN	72.2±1.8	98.8±0.3	92.3±0.5	64.6±3.5	95.6±0.4	90.1±0.5	74.4±0.9	62.5±1.2	68.5±1.3	99.9±0.0	81.9
GAS	67.5±5.3	97.5±0.5	86.1±1.5	59.1±0.5	93.3±1.3	85.6±1.6	77.4±1.0	69.4±1.5	76.0±0.2	76.9±3.6	78.9
DCI	66.5±3.3	94.2±1.7	94.6±0.9	77.8±7.8	86.8±4.5	82.8±1.5	75.5±0.9	71.0±1.1	74.7±0.1	80.8±6.0	80.3
PCGNN	53.2±2.1	90.2±1.5	97.3±0.8	79.7±1.5	83.3±1.0	85.8±1.8	72.8±2.0	69.9±1.4	72.0±0.3	69.2±4.4	78.3
GATSep	66.1±2.6	96.3±1.2	97.0±0.5	84.3±0.8	93.5±2.0	86.0±1.4	79.6±1.1	69.4±1.9	76.0±0.2	74.5±3.7	82.3
BernNet	66.8±3.7	94.9±1.5	96.2±1.4	83.0±0.6	92.8±1.7	83.1±1.4	76.9±0.6	68.8±2.9	73.2±0.1	66.8±5.8	80.2
AMNet	68.4±2.4	95.3±1.7	97.0±1.6	82.6±0.5	93.7±0.7	77.3±2.5	76.8±0.7	68.1±2.9	73.1±0.1	53.6±3.3	78.6
BWGNN	65.4±4.3	97.3±0.9	88.0±0.7	84.9±0.7	96.1±0.5	85.2±1.1	80.4±0.9	71.8±2.2	76.3±0.1	92.0±5.2	84.7
GHRN	66.0±4.5	96.7±1.1	98.1±0.3	85.3±0.6	96.0±0.8	85.4±1.9	80.4±0.8	71.8±1.9	76.1±0.1	79.0±2.4	83.5
RF-Graph	62.8±2.4	99.5±0.1	97.5±0.3	93.3±0.2	96.7±0.5	91.9±0.5	81.2±0.7	65.8±1.2	65.6±0.3	99.2±0.0	85.4
XGB-Graph	62.8±3.2	99.5±0.1	98.7±0.0	96.2±0.2	98.6±0.4	93.4±0.0	80.1±0.5	65.7±0.8	74.6±0.0	99.3±0.0	86.7
Rec@K	Reddit	Weibo	Amazon	Yelp, T-Fin, Ellip, Tolo, Quest, DGraph, T-Social
MLP	7.5±2.9	79.2±2.1	84.4±1.8	46.9±1.3	67.8±2.6	23.9±11.6	39.4±1.1	19.3±1.7	4.2±0.2	20.1±10.9	39.3
KNN	9.3±1.6	70.3±1.6	78.8±0.0	29.4±0.0	68.1±1.8	44.5±0.0	35.3±1.4	17.4±1.6	1.8±0.0	34.9±0.2	39.0
SVM	8.0±2.6	68.5±3.0	75.1±7.8	41.7±0.0	60.6±13.1	15.2±0.7	37.0±1.3	19.4±1.8	4.2±0.2	2.1±1.1	33.2
RF	59.1±1.3	82.3±2.1	85.7±0.4	74.8±1.4	72.5±0.3	39.5±1.0	17.9±1.5	17.9±1.5	4.2±0.0	45.3±0.1	49.8
XGBoost	75.4±1.4	87.0±1.1	86.4±0.0	74.8±0.0	72.9±1.5	72.0±0.0	40.1±1.5	17.9±1.4	4.1±0.0	20.0±0.2	48.3
NA	61.2±2.2	89.3±1.1	83.8±2.0	61.0±0.4	74.6±0.8	69.7±0.0	42.2±1.5	18.5±1.3	6.6±0.3	36.5±8.3	46.4
GCN	10.0±3.2	90.3±0.8	36.9±1.4	23.7±0.6	70.0±5.2	25.0±6.0	43.1±2.0	16.5±2.0	7.1±0.2	20.1±10.9	34.3
SGC	7.8±2.9	88.2±1.4	35.2±4.3	19.7±2.6	41.1±23.3	11.0±1.7	35.0±3.4	16.1±1.2	4.2±0.2	4.1±2.7	26.2
GIN	6.8±2.4	87.5±1.1	73.0±3.5	38.4±1.2	65.5±4.8	27.3±8.3	39.0±1.9	17.5±1.7	5.9±0.2	14.4±3.8	37.5
GraphSAGE	7.2±1.4	83.8±2.5	67.9±8.6	51.1±1.4	70.3±9.0	37.3±8.6	46.5±1.6	21.2±1.6	7.0±0.4	15.6±4.4	38.4
GATSep	7.6±2.9	87.9±2.8	84.0±0.8	43.6±2.7	64.6±5.5	27.9±11.3	46.6±2.0	20.1±1.8	7.5±0.3	14.9±2.9	42.1
GT	7.7±2.8	85.3±2.6	83.4±1.6	47.7±1.4	73.1±3.2	27.9±11.3	46.6±1.8	21.8±1.7	7.5±0.2	13.2±4.1	37.4
PNA	61.2±2	88.3±1.7	48.8±2.0	51.1±3.2	72.9±11.9	26.3±11.1	47.4±1.8	19.7±1.7	7.5±0.2	36.5±8.3	44.8
BGNNN	10.7±3.2	86.6±1.8	63.9±2.8	27.5±1.4	77.3±0.8	63.8±1.3	43.7±1.2	8.6±0.6	62.4±0.4	95.4±0.3	48.8