I spent a bunch of time on Voat as a kid, thinking I could be a free-thinking free speech absolutist who simply disagreed with the things other said around there.

What I observed is a crowd of people of an extreme ideology, who would try and one-up one another with further extremes, moving the overton window within the platform further to the extreme. As it continued, some would hit their breaking point and simply leave due to the toxicity, while others opted to continue the “who can be more offensive” game. The userbase, as it was, was doomed to forever become worse and worse, and smaller and smaller.

I believe that in the later years of Voat, the actually closed down the public-facing site and user registrations. I’m not sure what the Voat devs thought, but it’s pretty clear it didn’t go the way they’d expected as they had to pretty much hide their users from the greater internet.

This is discussed in this video about creating clones of existing platforms.