That was great then if it's permanent. Not unlike to the casinos that I know that they remove their faucets later on. If someone abuses it then why not lessen the rates? And then add some extra requirements. There is no real need to remove it. I can see that you are concerned of bots but why not put a captcha? This one is pretty common on many faucet sites nowadays.
Even though faucet is a sure way of rewarding small players with some amount to gamble with even though the amount may be small cimoared to other bonuses.
But I wouldn't suggest anyone going the faucet ways, since it's a long walk to attaining a tangible winning since the bet amount depends on the reward the player gets from the facet.
For people who cannot make a deposit, it is well suited, there are many of them)
Well, additionally, it helps real players "feel" the slot