No, because I try FortuneJack and its not required any deposit to get that free 25 spin, if you a new registered to their website wait atleast 24 hours to be activate the free 25 spin and you can try it.
If it's not required to deposit, how if we win from that free spin? Do we able to withdraw our winnings without any pending withdrawal? Will they let you playing with free money without any deposit?
Seems nope.
There should be a condition to achieve before you can play with free spin
If you win from the free spins? Normally anything you win from the free spins needs to be wagered 30-50x based on the rules of the site. Once you meet the wagering requirement then you are allowed to withdraw it the winning although some sites has max winning from free spins but it worth to try as you do not risk anything from free spins promo.
The condition to achieve is after you play the free spins not before you play the free spins. In this case, you'll get 25 free spins just for creating a verified account (email and phone number) at Fortunejack IIRC.