First of all before using the free spins that you have you need to know the wagering requirements, this is very necessary to know this because it's the first step to knowing what to do in order to be able to win and it's a way to avoid unnecessary losses. A lot of gamblers don't really read through the terms and conditions to actually know the wagering requirements, they just gamble to take advantage of the free spins but that's not really right. I hardly get free spins nowadays and I'm not interested in opening new gambling accounts just to chase this.
I believe that bonuses this days are really messed up, that's why I don't even pay any attention to it, because why would a casino place an unrealistic wagering conditions of 35x if they are not planning for your failure?
And one bad thing about it is that you may be chasing it, trying to fulfill the wagering terms without knowing that you are getting into deeper problem because of that, because you stand a chance of getting addicted or may lose more money than the bonus you are chasing when trying to unlock the wagering terms. That's why I don't pay any attention to it, because it's a trap that will make you to gamble recklessly.