Also the fact that you cannot see any tweet or essentially even visit the website without a forced login prompt drives potential visits/eyes/views/users away— this is probably the stupidest thing they have done.
Works fine for me and a lot of other people. What other site gets used for official announcements? Democrats still use it
That's simply inertia and the lack of another platform with the same level of critical mass. There's no reason it will continue to last.