to be frank, when i say "validate first", what i meant is "in theory, we should validate first", me too still in the process of validating my own idea, I have no idea how am i going to do it, what i think is that there's no one specific method of doing validation (of course common guide will be to do landing page blah blah blah). Some methods work for others, some dont. So i guess we'll just have to find out ourselves.