Literally. It generates hits, which generates money. Luckily, most of those who you linked have very specific audiences, they are either listened to, or reviled. There are very few who sit on a fence with any of them, and so the audience is inherently limited.

You're not going to change the minds of those here who are inclined to believe them... they'll just take the moment to call you an idiot and move on. Anyone else will recognize those names, shake their heads, and move on, unless we feel like getting angry about something.

All of this can be achieved without increasing the revenue of the beast that gives these Trolls a platform.