QQBrowser users from Dallas are more likely to be Chinese using a VPN than bots, I would guess.
Some of the new traffic did come directly from Tencent data center IP ranges and reportedly those bots signed themselves in UA. I can’t say whether they respect robots.txt because I am told their ranges were banned along with robots.txt tightening. However, US IP bots that remain unblocked and fake UA naturally ignore robot rules.
Well, of course not, since the service is illegal.