Taco Bell is giving 14 days of Game Pass with the purchase of a chalupa box, but you can easily turn that into 44 days.
Right now Microsoft has a big promo with Taco Bell. Every $5 double chalupa box you buy gets you a code that could win a special Xbox One X, but everyone who buys gets two weeks of Game Pass for free.
To get 44 days of Game Pass for free, just opt-in to recurring billing when redeeming the 14 day code. This adds 30 days to your subscription. Of course you have to plonk down some sort of payment method to grab the offer, but just be sure to cancel the subscription within the timeframe and you should be fine.
The tip comes from Wario64 on Twitter, who's always posting up tons of game deals and tricks.