After wasting many years creating one failed startup after another and either creating an MVP or for my first startup (TripEdge.co.uk) creating the entire travel web service (Google 'TripEdge' for the whole sorry story), I wanted a way to test an idea before doing an MVP, so I created www.pitchyourstartupidea.com with the idea that anyone can pitch an idea, link to a MailChimp or TinyLetter mailing list to see if there is any interest in their idea.