The faucet is fun for newbs and gets people interested or hooked to gamble the own money. I don't think it'd be a big loss if it was removed but it likely brings in more customers so has a benefit. If it didn't stunna would have likely removed it by now.
also i can add up that the faucet is a kind of a reward for the whales out there who bet huge amounts of money and then can use a max paying faucet and maybe get back some of the looses they had
I doubt whales are going to bother trying to recoup losses via the faucet. Waste of time for even newbs.