While I was at HubSpot during the initial rollout of their infamous $30k developer referral program, I remember one person getting a referral, paying out the $30k, and then taking PTO until they quit 90 days later. The developer who was recruited was already set from a previous equity cashout and had effectively retired.

Both programs got dramatically reformed after that, though naturally retrospective profiles of the program give it a much shinier glow.