Are grad students on here? Seems like it leans toward senior and mid career folks.
Q directed to grad students / postdocs who are checking this out:
What practices/behaviors would make this space useful for you?
How can senior folks best promote your work or interact w you here?
I agree with @emiller - Twitter feels more public (especially to senior academics with thousands of followers), and (from my experience), they feel reluctant to engage with trainees/grad students.
So far, my experience here has been the opposite, though - and I like that. For me, it's never been about promoting work (I have nothing to promote anyway), but I'm hoping to get insight + pointers from senior academics (which I was hoping I'd find at Twitter, and that was disappointing).
Michael Love
Barış Ekim 
Jordan Vasu