So there is the Traffic Booster, which I have been using for about 1,5 years now with three of my shops and its a pretty cool app. You can basically choose pretty specifically what kind of traffic you want (age, gender, location etc.) and its a scale-able app so I think I started out back then paying something like 30$ and I decided to increase my investment over time because I kept getting a pretty constant stream of very good traffic.
Part of the problem lies with ads on mobile. Mobile ads take an average of five seconds to load — about double the time it takes for desktop ads, according to research by the Media Ratings Council. Research from Adobe also found that 80% of marketers don’t have a mobile strategy in place for the next year — a serious point of concern considering that mobile devices now make up 57% of all time spent on digital media, according to comScore.