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You are talking about players that playing for money. For some of them playing poker is a work. But there are lot of players, that playing for fun. They brings some money just to lose it. It is not a problem for them, they pay for getting fun. And they are playing just occasionally.
They giving money for rake and pro players.Nicely put. Indeed, in fact, that's what happens. Of course nobody starts the game with the intention to lose it, but people are
ready to lose, even professional poker players are like that. That's why they usually play in the tournaments for which they have at least 20 buy-ins, they know they can lose, and they are ready for it.