Normally there are certain conditions attached if you want to convert or have these spins paid out. There must be a catch somewhere. Otherwise it would be very easy to make money.
For sure, some people will try to use this.
Then what catch that must be? if you are concluding something then best to addressed and give certainty because this may give malice to the readers as it seems you are pointing something malicious .
and besides every gambling sites has their own strategy how to lure players and new bettors and this are same as giving opportunities to make free amount but it doesn't necessarily mean they are tricking people.
please give clarity to your post since you are advertising scam site in which an obvious questionable threat to the readers.