Even though you won’t believe that this is a crazy idea, by the time Mark launched it, no one had a need for another social networking site as My Space and Friendster were already out there for everyone. The facebook was originally launched with a restricted membership.
2. drop box
When there were dozens of file sharing and sync options which were not popular, drop box launched it with a further ridiculous way , as we have to move all our things online to use it.
The only thing which Instagram had was a set of filters and that’s all.
Who will believe that software engineers will pay a monthly fee to create free software out of free software.
Firefox came to the battle when 90% of world’s computers had an in built free browser.