Last year, Google spent 16.4 percent of revenue on R&D, according to
Bloomberg data, and Facebook almost a quarter. At Daily Mail &
General Trust, owner of one of the most popular news sites, it was 3.6
percent.
--
The ads within the mobile Facebook app (and its
photo-sharing app Instagram) can't be stripped out by blockers. They're
delivered by Facebook servers with none of the usual identifiers.
http://www.bloomberg.com/gadfly/articles/2016-08-02/facebook-and-google-are-beating-the-ad-blockers
If you are interested in earning money from your visitors with popup ads - you should try one of the biggest companies: PopAds.
SvaraRadera