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.