I'm not surprised to see there are only 2 users who tried to participate in the review contest since casinobet give reward to 1 users only and it is even in a form of bonus spins.
They may get more reviews if they give all (valid) review with similar reward (even with low wagering requirement), I'm sure they will get at least 10 participants unless the value of the bonus spins is also too low.
I'm curious how casinobet will choose one of the 2 users, if I'm at casinbet's position then I'll give the reward to both users at least to appreciate their participation.


This is just a common bonus, nothing special with deposit bonus because many other casinos provide similar bonus.
If they want to be competitive, they should try to provide more attractive offers (at least remove the wagering requirement on their promotions where players need to risk their money).