I like git, I like RSS, I like only having to do markdown. I don't like paying for something that I'll have to keep paying for (mysubdomain.git.ht) if i want to keep my presence (like on a domain I already own but migrated to something else after i get sick of markdown in a couple of years).
Another thing:
> This application will be able to read and write your public and *secret* gists.