Pixelfed is great! But as much as I like the Fediverse, not everyone is here. :(
But I have a plan, to encourage people to use Pixelfed. Since I have to create error pages for the project, I have one in mind. When an instance gets rate limited/blocked, there will be a notice to use another instance (or create one) and a paragraph (or link) to encourage the use of Pixelfed.