Presumably that 45M is twitter + facebook + instagram? I imagine there's quite a lot of overlap.
His twitter account has 18.3M followers, not 45M.
I don't think that's enough to compensate for not bothering with press conferences. But still, at least I'm not Sean Spicer. What's a press secretary meant to do if the guy he works for doesn't bother with press releases?
Also, this means that as long as I keep the President blocked on twitter for 4 years, I can avoid all his drivel.