🧵 [10 / 10]
Eventually, the celebrity will want to publish something and that's another 1m notifications (14 hours) PER POST, he expects to be delivered to all of his followers, hogging a major amount of processing power and bandwidth in the process.
Meta knows how inefficient ActivityPub is at scale and that's why they are not overly concerned with big accounts fleeing their platform. There's very little to gain and much to loose from that.