I hope you know that if they are not making money from what they are doing they will no longer be in business again just as you are seeing them today? the free rewards you see them giving is a way to entice more people to visit their site so that they can register and gamble with any of the listed casinos in their site and since they are affiliated to them they have their own percentage from the profit made by the people they referred. This is what I think it may not be completely true but they have their ways of making money in their business.
The main reason they are here is because of money and that is the essence of every business or establishment. Though I agree with you that these casinos they are affiliated with may be paying them commission and other things that can make them stay in business, because without money they will be unable to stay in business for long, since they will need to pay their staff and do other things that needs money, but I don't think that it is the only way that they make their money because I think that it would not be enough to sustain the business, talkless of getting a profit from it, if they depends only on these commissions they are getting from those casino listed down in their site.
