It seems impossible for the current blockchain technology to efficiently broadcast every purchase of coffee in the world. They have to imagine how big blockchain must be and how fast the transmission needs to be for it to efficiently process micro-payments. If big companies, such as Starbucks, that needs fast and simultaneous huge data trafficking capacity, then only Ripple, XLM or bitcoin with Lightning Network might be able accommodate these specifications. However, bitcoin's Lightning Network is still in its trial phase and there are rumors that it is not running smoothly. Also, since the big boss has already eliminated bitcoin as an option, it seems like Ripple or XLM is going to bag a huge partnership.