It's difficult when the backbone of the internet isn't available to you. For instance, AWS can be denied cutting off vital internet infrastructure we take for granted. Further payment processors like Visa can cut off access. Even banks could cut you off and even seize your funds if they got the directive.
You can spin your own service is a nice fiction we tell ourselves but with financing getting cut off it becomes impossible to build a service that reaches a lot of people without a lot of money and a disregard for profit.
In China maybe someone would come knocking on the door to take you away to jail. But in the US, we don't need to go that far. All it would take is the press secretary telling big tech they need to help fight "misinformation" and pointing them in the right direction.