Crashino occasionally sends promotional message with free spins offer. Yesterday I had received 100 free spins on the Sweet Bonanza game. There was no wagering requirement on the free spin winning amount. The free spins was offered for a deposit of $50. However, I have lost my deposits and free spin winnings by playing the crash game there.
That is why we call this game "gambling". You took risk of 50$ to utilize this offer of free spins but lost. You may call this bad luck. Usually, such offers come with a wagering requirement but here without any wagering was a tempting offer.
Anyhow, did you try put all the 50$ and the free spin winning in a single crash game and lost them all? If you would have played the crash game with a small amount of money, even a loss in a few games could have been recovered by the winning games. Sometimes if you just apply some money management into your game and use your bankroll wisely, it saves you from overall losing the portfolio.