I didn't get one this round
Neither did I.
I normally get one promo a month whether I've made a call or not. It's never outrageously generous, usually $5 to $10, but I save them up and it really adds up.
BTW, today is 4x karma points on CP,
5x if you use the app. I buy time and save it up as well as the points. It really helps cut the cost when you go to make a call.