Twint is currently running a promo where you get 10.- back immediately after your 3 purchase (you need to activate the bonus first). In my case, I went to a Coop, made 3 consecutive purchases of a 10.- recharge for my CoopMobile prepaid card, effectively getting 1 recharge for free.
There’s also a 10.- cashback for the first purchase at Microspot over 49.-