Americans didn't tend to block ads in the Internet. Comparing to other countries, there were only less than 25% of people in the US who used the ad blocking software. But this trend is changing and it isn't a good news for people who create web content or apps. The percentage of users who block ads increases of around 30% every year and it is predicted that on smartphones this peace is even faster (more information here: http://venturebeat.com/2016/06/21/more- ... s-in-2016/.
It seems that the market will need to look for another source of income or different sort of ads soon.