Playing devil's advocate, the reason they would probably give off-the-clock is that it would make you more likely to get a second job they'd be competing against, and they don't want to invest in someone who turns around and leaves in a few months.

This is really a tacit acknowledgement that they know they can't compete if you aren't struggling and have the resources to leave when they try to squeeze you. They don't care about the work product, they are looking for slaves.