Well, I reduced the return % to 110 but the measured return is still over 200.
I suppose it's possible that this particular trade is getting a lot of toplist OUTs - but in theory, TP would reduce the skim OUTs correspondingly, wouldn't it? So to exceed the limit it would have to be getting almost exclusively toplist clicks. Anyway, I'll temporarily remove it from the toplist and see what difference that makes in the next 24 hrs...