You need some scripting code + database.
Example:
https://github.com/Greedi/bitcoin-faucet
it should be pretty easy to program, especially if you do payout manually.
Example:
https://github.com/Greedi/bitcoin-faucet
it should be pretty easy to program, especially if you do payout manually.
this code should work well for your simple btc faucet with ref system.