So there must be some restrictions for the CLOT which don’t apply to me when I create games.
Correct, those restrictions only apply to bots.
For human players, as long as you have the settings unlocked, you can invite any* account to play on them. (Even including mods if you pay a few coins to Fizzer.)
* Provided the account actually still exists and is not currently suspended.
Edited 11/8/2023 09:57:53