Most of StackOverflow&#x27;s income comes from their job postings. When I posted a job on SO a year ago, I asked them about Ad blockers. The salesperson told me confidently that they were not concerned because only &#x27;around 5% of visitors&#x27; or some other small number used an Ad blocker.<p>I was, and still am, quite sceptical about that claim. (At any rate, I don&#x27;t know how to feel about a web developer who does not use an Ad blocker in this day and age.) It began to make more sense to me recently when the Jobs section was added to the SO front page and the new CV was introduced: Their approach now is to help developers and employers actively look up ads&#x2F;CVs when they are in need of them.