Unfortunately, the login system is going to stay in effect. My old faucet, Bit Essence was attacked by bots, I lost .38 BTC in two weeks (also got ddosed and shut down). The added layer of authentication links your bitcoin address to your email. It allows for two things, I can track my users and distinguish the real people from the bots and it also allows for such a high reward. It's 2000 satoshi every 420 minutes, If you don't want to sign up then you don't have to. 
It is very logic explanation.
Sorry for your loss. I read that bots now are very big problem for faucet owner.
If you think seriously about your project, and i see that yes, so you have to think in long term like freebitco.in. Building trust always taking some time..
Good luck!
