Originally because I wanted to check it out when it first launched. I have been checking out reddit alternatives for a while and I've been waiting for a migration to happen from reddit, I figured they aren't going to keep old.reddit going forever. Wasn't expecting the api changes to happen first, but since folks are making the move I'm finally participating here because I want reddit style communities to succeed on the fediverse and there's a lot more people here now for that to happen.