Gibson isn't really doing full endorsements here, they have a loaner program where you put down a deposit and they loan you the guitar for a week so you can play it at shows. if you damage it you pay the remaining amount of the guitar's cost, but they aren't giving guitars to people in full endorsement deals.
i wouldn't support the loaner program. you pay money, don't get to keep the guitar, if you damage it you must purchase the guitar, and you're not allowed to modify the guitar while it's on loan. meanwhile, Gibson gets free advertising from you, assuming lots of people are interested in your band.
bogus deal as far as i'm concerned. i'd much rather buy my own guitar and throw on strap locks and swing it around and not be terrified of owing anyone 3k for damaging it.