An alternative is to create artificial social media personas who then promote ones content. That is what the Internet Research Agency, the Russian "troll factory" from St. Petersburg, did. The fake personas it established on Facebook promoted IRA created clickbait content like puppy picture pages that was then marketed to sell advertisements.
The profit orientated social media giants do not like such third party promotions. They prefer that people pay THEM to promote their content. Selling advertisements is Facebook's business. Promotional accounts on its own platform are competition.
The anti-Russian mania in U.S. politics gives social media companies a welcome excuse to clamp down on promotional schemes for sites like Liberty Front Press by claiming that these are disinformation campaigns run by the U.S. enemy of the day.