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 
Actually that doesn't mean their project is a scam or a failure project, It's possible that the teams don't update on social media because they are busy taking care of their real projects. I've found such projects, and they still exist today.