Someone on Twitter who picks people at random to follow, in hopes of boosting their own numbers
Your man Steve is such a "Random Follower" look at him following another 1,000 people that he has no interest in what they say or do. He is trying to boost his numbers.
Someone who just goes along with whatevereveryone else is doing and doesn't think for themselves very much.
A crowd follower will typically see every popular new movie, vote for whoever the "cool" politician is and go along with whatever current pop culture says is in without actually putting much critical thought or research into it.