[Zuider]

>So you don't get the "oh you lose" social cue [on twitter]

You don't get the silent downvoting that occurs on sites like reddit, but you do get overt disagreement which can go viral and result in consequences in real life such as being fired and harassed. Added to that, twitter is very proactive in banning people. My point is that the absence of one form of feedback does not preclude the use of other kinds.