From what I've seen with these mass exodus to the fediverse events, this is how it goes. A whole load of people leave $corporate_website, and then get impatient with the fedi-replacement being slow from the sudden spike in traffic. The impatient toxic people go back to $corporate_website, and the friendly chill people stay here.
It's great to see the fediverse growing, but I don't think we actually want to see it become twitter/reddit levels of popular.