Yes, it is possible to make some money from free spins in online casinos. While the potential rewards may not be as great as with real money play, there is still potential to win some decent prizes. Many online casinos offer free spins as part of their promotions, or as part of their loyalty programs. This is an excellent way to try out some games for free and potentially win a few prizes. However, you should be aware that free spins come with certain restrictions and other conditions. Make sure to read the terms and conditions of any free spin offer to understand the rules and restrictions before you start playing.
Previously there was blackjackfun which gave free spins with 0x turn over but now that is over.
Yes because from what I know free spins is just like any other spins there's no cons nor pros to it, so the chances that you will get some reward or money by using it is normal, but then casinos has a minimum amount of withdrawal of course, so you need to reach that certain amount for him to get money. And yes, some free spins are for the sake of the player to be aware in the system of the casino some aren't.