He wants shitbag, astroturf, conservative, fascist “personalities” to be able to respond to and every prominent non-fascist post where they can be promoted to the top of the replies.
As a bonus, it will also help the astroturfing oil companies better kill environmental efforts.
Maybe he wants to get rid off the somewhat smart people on Twitter so the rest can be easily radicalized with the intend that they vote against their interest and for the interests of rich people?
I'd say it's either that or he wants greater reach to feed his narcism.