Like dozens of other “Twitter killers,” Bluesky has sat in limbo since its launch– thanks mostly to an invite-only policy. Like dozens of other “Twitter killers,” Bluesky has sat in limbo since its launch– thanks mostly to an invite-only policy. But when the micro-blogging site went public last month, it skyrocketed to an estimated 4 Million users almost overnight. That kind of growth can be chum in the water for marketers. But is the social media startup worth your time? I sat down with HubSpot’s Manager of Brand Social Strategy and Analytics to find out. But first, let’s jump back