I will release a fix for this in the existing interestlosshack.
Thanks for the warning. I've already fixed that in the peasantry so will take a look at what you do to be able to give conflict advice.
As it stands it doesn't conflict with any awesome hacks.
I'm in the process of updating the mod so that the interest gain will happen (in a non-stomping way) for one chosen interest for a sim's OTH.