Experience, mainly.

I used to run a phpbb forum, on average the bot signups outnumbered the real people 10 or 20 times. And that was with some fairly robust anti spam measures in place - something I think this platform is too new to have properly sorted out yet.

I may be wrong, I don't know how the back end here works, but any place where people can post publicly will be infested with bot signups very quickly. The only real variable is how good the anti spam measures are.

I saw the same. I was just about tempted to slide back and browse quickly on my lunch break, then I saw that and just noped out of there. This place is building up quickly and strongly enough that I probably won't bother going back to reddit if he's going to keep up with this nonsense; I don't really need that sort of BS negativity.