Thanks for the constructive and nuanced question Derek!

Sure, happy to explain. Our approach here is very simple. At this time there are only two reasons why an account would end up on the "can't trend" list:

1. They are spamming or gaming the trending algo. We curate this list manually to best of our abilities, while we work on improving the algo.

2. They post adult content. We don't have anything against adult content per se, we don't block it elsewhere. Our decision is simply to not promote it in the trending feed because that's not the type of service we are building.

If anyone thinks they ended up on the can't trend list erroneously, please let us know and we will take a look.