Maybe it's better to host a web wallet rather than only a faucet.

//Edit: need to add your faucet to the GUI / light wallet and give user a chance to select your faucet (now there is a edit box for faucet address but not a list like Websocket address).

The faucet software is open source and free to use
https://github.com/cryptonomex/faucet

I want to pay for new users to register. I want to be a registrar / faucet

is there any easy way to do this?