Someone's going to create multiple bank accounts to fight for a bigger slice of the $50 they're contending for on an open redirect finding? This sounds like a concern that is plausible mostly on a message board.
This sarcasm seems misplaced. How much effort does it take to share the details of a bug with friends? Not to mention that some bounties are much greater than $50.
Particularly when you have a syndicate. You find a bug? Share it with the group, they find one and share it back. Now you have two smaller pieces of the pie that cumulatively are bigger than your initial piece.
And some payouts are 10k, I’ve never even heard of $50 minimums, I thought it’s either $100 or swag.