Warning is gone now. I've been watching OpenMonero for quite some time now, and honestly, whoever's running it doesn't seem to really know what they're doing. But from what I can tell, what they've done definitely look like an exit scam. And now they continue as nothing happened.
Do you know if anyone is actually trading on OpenMonero or all all those trading offers are all fake?
Warning message is still visible on their kycnot.me community page, and they apparently have Reddit community group, but I can't find it.
All I could found was little information posted in r/Monero