Gamblers who play for fun will still prefer to play for fun with a chance of having profit at normal casinos, besides being perfectly possible to socialize with other gamblers there too.
And if they are up for fun and don't want to spend any penny, they should just go to the casinos that have demos. Or if they want to keep going, there are a lot of giveaways that they can join so that they can have a bankroll if ever they're lucky but that's a hit or miss opportunity.
If there is no cash out then there should be no need to cash in money just to play the so called games.
Maybe the term they've used is to convert automatically any money deposited to them to their in game money or tokenized asset inside the platform. There's a tricky thing with such thought of having no money to play with and just pure socialization. I don't think that having no source of revenue would be able to make this operation continuous.