[adityakothadiya]

I don't think so this particular case is just "few hours of A/B testing". They were testing pretty drastic design changes - and it takes lot more than few hours to come up with design concepts, copyright text, and then actual implementation. These were not typical "test different landing page title or action call button color" tests. These were brand new design changes. So for established companies, this is absolutely the right approach - as your product is already ready, now just increase the sales. But for many early stage companies, when product development itself is constantly evolving and demanding, spending so much time on different design iterations is not always possible. Agree, their results are phenomenal, but not sure how many companies understand this before they try.