That is indeed the question.  Say you’re a big huge tech company.  You make a lot of cash by putting small text ads on websites.  So, then say you release a browser.  And like the competition, you eventually decided that you should make some type of ad-blocking extensions (here and here) available to your adoring masses.  Sell ads…block ads.  So how do you live on both sides of the fence at the same time?  Aye, there’s the rub.