Board Game Arena

For awhile the advanced rules were available for newly created games, but they seem to have been removed?

Because there was UNDER CONTRUCTION and some players don't unterstand what it means.
So there are not available to players only to testers.

This is a beta game, so all players are by definition testers? Or are you saying the base game is now complete and no longer beta?

ALPHA testing and BETA testing is not the same.
In BETA, you are testing features that should work in theory, so you are looking for bugs.
In ALPHA, there are features NOT working or not implemented.