We are talking about gaming platforms that allow users to play casino games without having to wager real money. The goal here is to have fun and socialize with friends.
Social casinos look and function in the same way as real money online casinos. Players can play slot machines and classic games like bingo, poker, and roulette. However, instead of betting real money, social casinos use virtual currencies and points.
You may have to deposit a certain amount of money first, but playing on such platforms does not mean that winnings are paid to a debit card.
There has to be some merit in betting real money in exchange of virtual currencies and points. For example, the virtual currency can be used to purchased in-game items or any type of item that can be used in that game.
In essence, what you are creating is a game where you bet real money in exchange for some points that can be used in that game (e.g. cosmetics on your profile, extra effects, etc.) in order to entice the person to play.
This concept can be viable but you have to gain a consistent amount of people playing on that casino in order to make it liquid. If you lack players, then you may have a hard time sustaining this game mode.