You have to watch 1-3 ads to get credits when it says only 1 (which it doesn't give you 1/2 the time, even though you wait several seconds for the ads to load), but the "a moment from our sponsors" ads load immediately and pop up everytime your not in the store or in a match. The game is fun, but you have to be willing to spend >$5 on premium, deal with a lot of ads, or spend 160 days to earn tokens to buy premium when it's for sale it order to play more than a match every 10-30minutes.