Yeah some project are damn too lazy to update their social media account, to me it is among the things to look out for when scouting for a new project to invest on, because if the social media of that project is still active it means the team are keeping in touch and also updating the public, once the social media no active anymore better start to run as fast 
Social media inactivity doesn't justify a project, the team might be busy working on other utilities for the project, I believe that development will always comes first for serious teams that really want to deliver something to the world, I will be more suspicious if teams are always available on social media every time