There is another factor that people are ignoring for all the talk of technical possibilities... Those who are minded to go out of their way to install somethin

There is another factor that people are ignoring for all the talk of technical possibilities... Those who are minded to go out of their way to install something that blocks ads probably aren't very likely to click ads anyway. They are also probably technology 'leaders' who help sites to bring in all the regular folk who do click the ads. Google is probably the least likely company to lose users this way, but they have another factor that they want a good reputation with that community because they want to hire lots of them.