User only rolls or pays

The phrase user only rolls or pays (or UOROP for short) is used in two powers constructed from the Healing advantage on page 151 ("Restorations") of GURPS Powers. Both of them have Based on HT shifting the power away from IQ, as well as the the Affects Self enhancement.
This is neither statted as an enhancement or limitation to the underlying advantage, indicating it is a 0% modifier or "feature".
The full phrases are as follows:
*Healing Drug: "The user only rolls against HT or pays FP if he’s also the recipient."
*Universal Antibodies: "The user only rolls or pays FP if he’s also the patient."
The implication in both cases is that the subject/recipient/patient is the one who rolls against the attribute (IQ normally, but HT in both of these cases) and who expends the FP cost. The "user" is only able to be this due to the 'affects self' enhancement.
No option appears to exist for the user to CHOOSE whether they or a different target spend the FP and make the roll.
Presumably the drawback of being less able to help others (with lower HT and less FP) offsets the benefit of being more able to help others with higher HT and more FP)
Another issue is likely that the penalty for cumulative healings would build on a target regardless of who used this type of Healing on them, whereas penalties would accrue separately for separate healers of the same target.
Category:Features