I suspect it's much the same here. I've commented elsewhere on this, but there are bots and shills on this site. They're trained and tuned a little differently, to say and do things that won't raise suspicion.

They've been here since the election at least, but in the last couple weeks, they've gotten much more noticeable. I think a lot of sleeper accounts have become active. Either way, the SN ratio of this pace has degenerated noticeably over the last month.