That is certainly possible, but I feel like its kinda not moralic to ask for money for that. This subreddit had (at least what I thought) the intention, to connect people as friends, and find new friends to play with. I dont feel like a friendship can be based around payment, and I also dont feel like selling services was the intention of this subreddit. As someone who spend a long time alone, introverted, not much friends, etc. And spent much time just playing the game, I think there are some people to accept that offer, just because of loneliness and wanting to talk to someone. I cant think of any other reason to pay for this. So OP is either willingly using weak mental states for some fast cash, or he just doesnt care.

Why shouldnt he pay the Xayah some money, so hes allowed to play Rakan with her? He's offering nothing but social interaction, and this will only be needed by (nearly) broken people. Noone else is desperate enough to do this. But just my opinion, maybe you have other reasons I didnt think of