I hope you are not expecting too much from this contest because the prize is in a form of Free Spins and there is only 1 winner that you will choose randomly.
How about the winning amount from the free spins? Is it also coming with 35x wagering requirement or it is a free wager?
It is pretty clear that they have hired an inexperienced person as the promotional manager. They are only giving priority to the profit of the casino. The 'multiplier madness' contest will work as a win-win situation for the casino and lose-lose situation for the participants. The review contest is also going to be run in unprofessional way.