Aten likes Feradi quite a lot. Many people are good at games; anyone can be good at games. Almost no one is good at being good at games. It's the sort of thing that only comes with a genuine passion, a desire to prioritize it over other things. Anyone could copy that but most people don't, because why would you. Aten feels no urge to copy a genuine passion for working, even though it would make him much richer if he were employed all the time instead of half: what use is money if you've overwritten the parts of yourself that would benefit from having it?
Feradi innately cares very much about table games (or, mostly the one), which is why he's good at being good at them in a way that almost no one else is. And accordingly Aten is fairly fond of him.
So when Feradi comes and dangles a new card game in front of them, and says he expects Fiaten to enjoy figuring out the rules by playing much more than by copying the knowledge or having them explained, and does not say but does imply that he'll only go along with this if Fiaten gets them both lunch and also dessert, well...
They aren't exactly rolling in money at the moment, but it will not literally cause them to need to pick up a job immediately, so Aten mentally leans on Fia in the way that means he wants him to accept.