Free spins also sometimes don't give anything, I've had several free spins but didn't get anything, although I've also had big wins but mostly not, but when I buy free spins it's more possible to get a decent win and it's more exciting than the free spins that come from regular spins.
The experience is quite strange because here lies the probability, the spins that are purchased are more likely than the spins that are given for free.
I do not think that the free spins have some great probability for winning than regular rotations. The slots are a very complex game that can easily delay and very quickly devastate your deposit if you get away and even more so if you put a high rate for rotation. I do not see the point of checking my luck in the slots, because here it is not only in luck and in the low probability, there are only a lot of players, but only a few will win, the rest will simply give their money so that the winners can divide them later, and the casino will take its share.
I received 10 free spins, but only two of them gave me a profit of more than 50% of my deposit. I also purchased 10 spin features, and 4 of them gave me a profit of more than 50% of my deposit. I tried this myself out of curiosity, and I believe it because I did it, but what we can’t discuss is luck—it might be present in some moments that can’t be explained.
By the way, I spent 3 hours searching for free spins.