I am actually glad this product exists; secured cards are very useful for getting adults onto US credit infrastructure and they’ve largely disappeared as a marketed offering from banks with good distribution, so you previously had to call around to find a place that would do themhttps://twitter.com/Kr00ney/status/1138079703938621441 …
They freeze the $500 deposit for a while and then give you a credit line of up to $500 on the secured card, which you use as a normal credit card, paying interest if you revolve a balance and similar. After you've demonstrated responsible use, typically in 6 months, return $.