Agreed on this, Their free BTC faucet reward is also just a dust amount and not worthy to be abused by multiple account farmer. Theres no VPN that can gave them such massive unique IP without even noticing by the casino support. Probably Betfury detect some abuse and now they upgrade the requirements as an excuse for limiting the budget.
They can always limit the amount of BTC that can be stored from this faucet to avoid abuse.
It seems to me that most regular users claim free boxes a couple of times just for fun, but only abusers are willing to do it on a regular basis with farms of thousands of bots. In this case, the abusers are likely to find cheap ways to get unique IPs for each bot. Whatever it was, the decision to prohibit rank 1 users from using free boxes confirms the fact that abusers are a huge problem for platforms like Betfury.