Did you even read the blog post or the ToS changes? You're either misinformed or lying. Banning projects that « mostly consist of code written by "generative AI"-tools » is not the same as banning « all LLM assisted projects ».
I don’t think the slippery slope is a fallacy. If a group makes a change in one direction is it not more likely that they will continue making changes in that direction than if they had not made the initial change?
It’s not a fallacy if it actually happened.