It's officially targeted but I've tried it on a number of my accounts and it worked on all of them https://www.amazon.com/kindle-dbs/promoLanding?tag=cl03f-20&ascsubtag=a9173762eb2111e79c7f4e42ddacaef70INT&promoCode=b016f5a2-59d0-4c1e-a72f-b2fa72baf31c