While lichess moderators have the right to ban whoever they want, I don't see how the games violate the lichess terms of service.
Lichess specifically allows you to play custom positions versus stockfish at any allowed time control. So I really don't see how this is much different from messaging an active lichess user who plays hundreds of games per day, and telling them to stop playing so many because it "wastes server resources".
I do also think that once a moderator warns you once though, you should stop. But in this case, I don't see any reason for a moderator to give such a warning in the first place.
Lichess specifically allows you to play custom positions versus stockfish at any allowed time control. So I really don't see how this is much different from messaging an active lichess user who plays hundreds of games per day, and telling them to stop playing so many because it "wastes server resources".
I do also think that once a moderator warns you once though, you should stop. But in this case, I don't see any reason for a moderator to give such a warning in the first place.