The short answer
Paras Chopra had no budget and no audience, so he borrowed one. He read 10 to 15 academic papers on conversion rates through Google Scholar so he would have something publishable to say, then wrote educational articles on A/B testing for Smashing Magazine and MarketingProfs without ever promoting VWO in the body: the only link was in his author bio. The clever part was that each publication got its own exclusive beta invite code, so the editors had a reason to run the piece and readers had a reason to click. He quit his job with 1,000 free users and zero revenue, hoping for 1,000 dollars a month; the first month of paid plans did 4,000 dollars. He had wanted to launch at 9 dollars a month and was talked into 99, which turned out to be the single biggest lever: 25,000 dollars a month within eight months, 1 million dollars a month by 2016, and a 200 million dollar majority sale to Everstone in January 2025 with no outside funding ever raised.