[alpple]

For example, I'm curious what could happen if many of the platforms that distribute information become more narrow in what they distribute.

[echelon]

It opens the door for competition.

This is why platforms still try to cater to both sides as much as possible. Watch how uncomfortably the giant platforms handle political squabbles. They don't know how their actions will be taken, so they try to come across as inoffensive as possible.