Re: FaucetHub.io - Alternative to epay, faucetbox, paytoshi. Coming this month!
How is registration going to help against bots? It's an honest question, maybe I missed something 
I mean, it's one thing when user has to register on each faucet. Then it doesn't make sense for bots to waste time and money creating accounts on that single faucets. But with registration on FaucetHub.io that'll change. Assuming 1000 faucets will move to FaucetHub.io, creating 10 accounts allows abusers to make 10000 claims with their bots. It doesn't help in any way. And I'm completely skipping the part where a bot for creating accounts is created, which should also be easy.
It helps with monitoring malicious user(s), flagging, reversing transactions, alerting entire network about a malicious user and a lot of other thingsI mean, it's one thing when user has to register on each faucet. Then it doesn't make sense for bots to waste time and money creating accounts on that single faucets. But with registration on FaucetHub.io that'll change. Assuming 1000 faucets will move to FaucetHub.io, creating 10 accounts allows abusers to make 10000 claims with their bots. It doesn't help in any way. And I'm completely skipping the part where a bot for creating accounts is created, which should also be easy.
But the malicious "user" will probably be creating new accounts all the time. And all the other things you mentioned doesn't really change whether you require registration or not. You just changed the user identifier used in these action from cryptocurrency address to email address.
Kazuldur - imagine, that mex will implement a rule: 1 IP = 1 BTC address.. so bots will have much harder work to do it, especially if the registration will be secured with some captcha(s).
Also imagine, if lots of faucet owners will flag one IP / BTC address, it could be banned globally and will not disturb the faucet owners that using faucethub.
Also imagine, if mex will implement some badass IP database and you can check some checkbox to automatically use this blacklist..
The faucets will have much higher % of real humans, it can be hard times for bots and scripts
fingers crossed mex! (i know you already have these ideas in your code + much more)