Board Thread:Game Discussion/@comment-26829117-20160522124555/@comment-27893266-20160912155426

Sirebel wrote: They are limited, I think somewhere around 20-40 per day but I haven't tried counting them and am avoiding using them on principle. However, whilst you are getting these extra assists with free ads, they are only useful sometimes (i.e. during special events like gauntlet) and the people who are still getting 20 ads get them too...

No, the ads are not limited for any other use. Neither for servicing the car, neither for upgrades, neither for gaining tickets on Gauntlets. Just for the daily gold rewards.