Unless the rules surrounding this have changed in the past ~12 months, I'm pretty sure this isn't correct.
I was under the impression that cheating in unrated games was still against TOS, unless the opponent was aware assistance was being used and agreed before the game, in which case it is fine.
Yes, according to the TOS, it has to be known that one (or both) are getting assistance. On LiChess, casual games means anything goes (they do not even check them).
It's the same on Chess.com - in unrated games, you can get help, use an engine, whatever.
Unless the rules surrounding this have changed in the past ~12 months, I'm pretty sure this isn't correct.
I was under the impression that cheating in unrated games was still against TOS, unless the opponent was aware assistance was being used and agreed before the game, in which case it is fine.