Amazon aren't the only provider of hosting services, even if they are one of the largest. It's entirely doable to shift providers, even in the face of censorship - The Pirate Bay is one long-running example of this.
I'm not sure how you missed the point by that much. Infrastructure bans are a thing now. You can't produce an app to compete with Twitter and Facebook if you don't have access to scalable infrastructure. Moving to a different host to get canceled there isn't a solution.