Wikipedia
Adcash
Adcash is a worldwide advertising platform based in Tallinn, Estonia. As of 2014, the Adcash platform delivered advertising content to hundreds of millions unique visitors each day through its network of over 100,000 websites and mobile applications.
Adcash serves many different companies, although its largest clients are online games development firms. In total, Adcash operates in 249 countries and territories worldwide.