I know this has been reported before and dismissed but IMO its something that should be changed to help avoid a lot of confusion I've seen from people surrounding it...
Reasoning: Maybe the only ability added by a quest that isn't listed under Active Effects and it seems rather strange leaving this out. Also the description is already there for it so it seems like it was intended.
Proposed Fix: Duplicate the magic effect "AbBlank", uncheck "Hide in UI", change the name to "Prowler's Profit", and replace the old effect on the ability "TGCrownProfit".