There are certainly a lot of other ways for the house to cheat:
* Bet Rejection (Reject a bet on a good game)
* House whale (Selectively lower the potential profit on a good game)
* Simulated lag (Reject cashouts that occur a few miliseconds before game crash)
* Not terminating a game cleanly
You certainly seem to be an expert on cheating!

Good point though - all of those four would work even with provably fair crash point selection.
House whale would be pretty noticable after investments start pouring in and the auto-cashout limit is higher.