Unless their FICO score is a mess. Sounds like their only other choice is a credit card. But those folks want all their money. Grant probably knows there are certain number of huckleberries who won't claim their "gift certificate". The 28% could be significantly less.
There is an outdoor company based in Seattle that pays their members a dividend. While I doubt this is still the case, for many years, they counted on unclaimed dividends to cover some operating costs.