I'm pretty sure guests can only pay Unrated games, so even if someone is using an engine, it's not a violation of the Fair Play policy, which I'm pretty sure only apply to rated games.
I don't see anyone stopping anyone else from cheating as a guest.
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who cares i never see guests playing in my matches lol
What if you cheat as a guest? No one bans you, you can turn off trackers and cookies to not be tracked, add a VPN to that for unlimited cheating potential.
Is there a system for guest cheaters?