Adblock Plus is the most popular browser extension to block advertising and has been downloaded more than 300 million times. German media groups including RTL and ProSiebenSat.1 are seeking damages from Eyeo. Eyeo’s business model operates around its “whitelist” service, which allows some ads to appear to users. The “acceptable ads” program has been running since 2011, but this is the first time we have gotten an insight into how much companies are paying to be included in it.”]