Your payment will be in some form of cryptocurrency. The ones that I have done were either paying Bitcoin or Litecoin. While I have found a couple of apps and sites that are actually paying you the majority of them I have tried were not paying. The big indicator is when these apps are paying out really good money just to view an ad or "check in" as they put it. The ones that actually pay you are paying very little.
My advice would be to stay away from these altogether. You earn so little on the ones that are legit its not even worth it. Then when you try and earn more by downloading apps you will find that those apps contain all kinds of junk that will lag your phone up. I had to factory reset my phone due to this when I was trying these out for a review. There are plenty of sites that pay much more for you to do surveys like MTurk and CashCrate. Currently they don't pay you in cryptocurrency but you can always purchase it with that money.