It's indeed a different scenario if we compare it with other casinos where they ask their users to wager with their official games only. 
Are you sure about it? More than 90% of the casino doesn't count the wager of in-house games if the user takes any bonus (like deposit bonus). There is nothing exceptional on MoonClub .@OP, You need to be more active here as your casino is new. You have to clarify the inquiries here to clear the doubts. Your casino has a Curacao license, but most of the clauses of your casino rules are copied from other casino.