They are presumably intended to be comforting words. The CLA's website never states explicitly how HECA's revenues will be disbursed. But implicit in this promise, we might think, is the idea that such revenues would be shared, in some equitable fashion, between those who write books and article and those who publish them.
Most academic authors receive little more than proverbial book tokens.
While full bibliographic citations are obviously required for short loan requests made through the British Library, the ALCS has no idea as to which articles have been used.