Those free spins are wager free.
Have you checked "What you need to know" part of the promotion page before saying this? The promotional pages are providing misinformation if your statement is true.
• Winners will be announced via email within 72 hours. Prizes will be awarded as bonuses valid for 14 days upon acceptance.
• Bonus winnings can be withdrawn after a 35x wagering requirement is met. Different games may contribute differently to the wagering requirement.
It seems there is a bit miscommunication here, I believe he answered my question about the free/bonus spins as the reward for the review contest and what you quoted above is the rules for the multiplier madness.
By the way, just noticed that they also offer VIP transfer program but as far as I can see there is no instant bonus as one of the benefits for doing VIP transfer.
Maybe they can offer extra reward on the leveling up bonus or other bonuses if they cant afford to lose some money to reward for those who are willing to do VIP transfer.
This way, players will only receive bonus when they are actively betting so they do not need to spend some money in advance.