This model is great at long horizon tasks, and Codex now has heartbeats, so it can keep checking on things. Give it your hardest problem that would take hours with verifiable constraints, you will see how good this is:)
I get these too. But for some reason, I believe it might be facebook which is doing A/B testing by sending friend requests from random bots to people whose activity is very less. The friend requests are usually from the opposite gender apparently.