They claim that they have no wager requirements for the free spins. But you have to wager your deposit .5x or 1x I think. If you do so and then withdraw your winnings or your initial deposit they restrict you from receiving further promos. Seemed sus to me back then and is still suspicious to me now.
The wagering requirement is 1x the deposited amount only not your winnings from free spins. So, technically their claim about no wagering requirement on free spins is true.
Honestly, I don't think there is anything suspicious or shady here. Their bonus terms and conditions clearly states that they have the right to ban you from participating in their next promtions if they find out you are making deposits only to take advantage of the free spin bonuses and cash out as soon as you meet the wagering requirement (playing low risk games):
Should the player claim no wagering slot bonus and circumvent payout wagering requirements via low risk betting in table or live casino games, this could trigger thorough KYC, removal from further promotions participation and depending on severity of policy breach – account suspension.