However, I will add this (in all fairness): The opportunities for free credits has gone up somewhat dramatically, albeit at the cost of enormous amounts of personal time.
It used to be seven carousel items at 30 seconds each for seven views.
Nowadays, some of these "ads" are mini-movies, 14 plus minutes long, and with absolutely no entertainment value whatsoever. The only watchable one was Duran Duran (maybe the first two times). The rest is torture!
But ... if you don't have the funds to budget, at least you can waste enormous time gaining free credirt, like I do.
Just remember, WGT, all that time spent watching this crap is time lost playing (and making it necessary to replenish balls).