I just don't understand what does the Faucet get out of it? Is it for advertising purposes?
They get a automatic flow of multiple income streams from the faucet traffic clicking on banner ads and joining affiliate banners.
The faucet owners earn profit from multiple ad networks that pay for hits and clicks. Also they earn referral commissions from affiliate banners and links.
IF done right, anyone can run a successful faucet website.
Tip: If you thing you cant, then don't try.