It's a small world after all. I helped Feralfront implement that very same mod with extra integrations (trading accounts, moving money, etc (forgot the rest...). Had to tweak a few queries because such a large and busy site exposed inefficiencies. Learnt some SQL optimization tricks along the way. Was very stressful worrying and hoping that I would not screw up.
This was way back when (IIRC 2011, before the name change)
Apologies if any of the stress was due to anything having to do with the administration at the time. CritterCosmos is less of a branching off of FeralFront and more of a... new site due to a lot of stress and disagreement between a majority of the long-term staff. We hold no affiliation with FF other than it being a common starting ground for many of us. I'm sure they would say the same.
We do miss a lot of the capabilities that it sounds like you created within the mod! Is it something you would consider doing again with the Elkarte software? It sounds like it wasn't much of a fun time, but if anyone knows what we want it sounds like it's you. :D
EDIT:
I just saw the PM you sent me! I will discuss this with my fellow staffers and get back to you on it! Thank you!