Yes i think so they must be put a low house edge so that more players are play again. If they house edge still there i think more player are not interested to go play again. They go there for faucet only.
Lowering the house will not work.
If they will do it, then why will gamblers still play on a dice site that is not popular? They will still choose those dice sites that been used to be since the beginning. Freebitco is only for faucet purposes.