Faucet it's one of the ways trought which the chain of bitcoin is maintained. Bitcoin has a large capitalization and comunicate in the world by the means of nodes. Trought faucet, a person partecipate in a bitcoin transaction and receives back a little amount of the cryptovalue he worked for. Simply try understand how faucet works by reading the instructions shown in each one of them and enjoy your gain. It's not scam and nor gambling, it's just a remuneration to a little work You did for the cryptocurrency sistem.