How will you feel if someone you know or just a friend of a friend walk up to you and ask you to finance them in gambling in exchange for a portion of their winnings? Does this even make any sense?
This is quite normal, but I think it can go two ways.
Scenario 1: When the person you trust to fund has a history of previous wins, and you can verify it, then it makes sense to sponsor him. It's somewhat like a form of additional capital mobilization. This often happens in the investment field, functioning similar to investment funds, where passive investors contribute money to the fund to do business for them and share the profits.
Scenario 2: If the person has lost all their money and approaches you for sponsorship to continue gambling, it's truly foolish to fund them. I believe you can assess in which scenario the person falls, right?