Honestly, its quite a rare thing to end up getting some tiny amount from the faucet and then end up with a big enough profit that you could withdraw. It is not impossible but it is as unlikely as anything could get. I would advice people to learn how to gamble, try out the demo one, and then just deposit real cash and gamble, that's the path that a newbie should take. There are too many very easy games here, not easy to make a profit but easy to understand how it works and that means you would be starting to gamble without getting into anything too complicated and could have some fun for yourself easily.
Its rare and some site will not allow you to get that money without even depositing money. Profit from faucet usually being questioned by the site. Demo option should be more ok to try the site, and if it works well for you then you can start depositing some funds. Some games didnt require a demo option because its easy to understand, and many gamblers didnt even try this option at first, they tend to gamble right away.
Right some sites will ask you to have wagering requirements in order to gamble or withdraw the amount you have made with these faucets but speaking truly how much time you will need to devote to have some amount with which you can actually bet upon on your favourite slots or any other game? So it's not good for me at this time.