This seemed insane and off-brand till I read through everything. Its basically a no-kyc way to buy STRC. The high yield is due to a dynamic of many holders of this tokenized STRC that don't want to lock it up for 30 days that are 'giving' their yield to those that have 'locked' their tokenized STRC to get the STRC dividend. So its a bitcoin backed stablecoin. Wild world.