I had an NPC that was a priest of the goddess of luck, and collected tythe by playing Liars' Dice in taverns. Our barbarian lost like all of his gold to him lol
He didn't survive long, but the party being cursed by the goddess of luck was even more fun
Nah man, losing money to a Tymoran in town means she favors you in the dungeons. It's her version of a tithe.
Lose 10 bob in town for advantage at the DMs discretion in the dungeon. Hell I give my players an inspiration point anytime they gamble with a Tymoran; they can win the bet or something more important later. I think of it like the Luck domain from 3.5e.