My friend probably has a PC (Windows), but no cell phone (Android). He also has the option of activating Cumulus vouchers and coupons at home - but not the stamp card.

Specifically, it's about *coffee and hot drinks"... He can't activate them, but if they were activated, he could activate the coupon on the PC after the 10th coffee purchased.... However, this is of no use to him because he has no access to the stamp card for the initial activation of the offer.

Is this not a contradiction?