Re: And thus is why hackers profit...
Blood and organ donations usually don't pay, because that creates unwanted incentives.
"Well Grandma is probably on her way out, and that nice Mr. Edward Vil says he'll pay us $10,000 if we unplug her now."
"I need food. Someone buy my kidney!"
The only comparison I can see would be the developers of these programs purposefully putting in exploits for their mates to "discover" later on. That might be happening, but surely there is some tracking happening. "Herbert, this is the 14th flaw found in your coding", so doesn't seem like it would be a great move.
You could approach developers of companies to pay them to include vulnerabilities for you to discover, but then you have to figure out how much you'll likely get and I doubt the amount you'll be willing to hand back is enough to get developers to intentionally make bad code.