I'm sure that if you posted your app/site here, people could give you plenty of reasons. Ask yourself what you think the reasons are. What would you do to "kick

I'm sure that if you posted your app/site here, people could give you plenty of reasons. Ask yourself what you think the reasons are. What would you do to "kick your own ass"? Technically, I am not buying the "there is no reason" either most of the time. It is probably any number of common reasons like red flags (filled with buzzwords and marketing speak, weak/iterative product, single founder with no history of success) or maybe it is just a bunch of more minor or subtle things. Maybe they don't think there is a huge future for X even though it is popular now; they think Y is on the way up or there are just 10 other applications doing something like X which are more compelling or have a team with a better pedigree than you. Maybe sometimes it is fairly easy to give a reason, but then it will be expected for everyone and they get a lot of applications now. It would be hugely time consuming to give a detailed evaluation and maybe sometimes too it would be giving away some secrets they don't want to.