How much is the amount per bet on your free spin? I might consider playing tonight on your slot since this is your last day of promotion. Lastly, I notice that you are using fiat on your casino. Do you have KYC requirements for withdrawal? I don't browse on your previous post history so I'm sorry in advance if you answer this already.
Edit:
Your slots can't be play using mobile browser.
The cost of one free spin in the Tuesday or Friday promotions is 0.20 USD.
We do have a KYC verification in place, according to the license that Winz.io is operating under. Usually, we do not request it on the first withdrawal, unless any suspicious actions were performed by the player.
What kind of browser are you using on your mobile device and what games did you try to play?