Why Facebook represents a fearsome opponent for ad blockers

The news that Facebook is going to stop users blocking ads is very welcome. 
While you can argue that ad blockers give users power over what they are exposed to online, they also damage the businesses of companies that depend on advertising revenue, and it’s good to see a company like Facebook, with both scale and great technology, fighting back.
Data from the IAB earlier this year says that 22 per cent of UK internet users use an ad blocker, and that the numbers are rising. It varies