[YL108]

You are also right! I think if you've build several products before it's more easy to choose the right path building great products. But I do also see a lot of people just building something behind closed doors without thinking about the problem they really want to solve. Of course, justyo.co for example... I don't think there was a huge need in sending YO's :D

[gchokov]

Yes, when you've built several products, you definitely start to see things that work and things that do not work and you gain experience. Again, I am not against validation, it just should be used moderately and not exclusively as a key indicator if you should build something or not. Products like justyo.co popup once in a while and due to some pretty random events at some point they become a hype. I tend to think the creators are having a lot of fun as well, without really thinking for monetization that much.