Monday is Starbucks Double Stars Day (YMMV)

I don’t know if every customer gets the same “Double Stars” day, but my email says that Monday May 22nd (2017) is Double Stars day! You don’t have to do anything to activate the Monthly Double Stars offer, it happens automatically. Almost everything you buy counts, except for gift cards and reloads.

With Double Stars, it means you earn a free reward for every $31.25 you spend. Typically $62.50 gets you a free reward. Strategically, double stars days are a good time to make capital purchases (coffee machines, coffee cups, etc) and consumables (coffee beans, tea bags, etc).