I'd love to see an implementation that uses "parasitic storage". There seem to be enough free places to post content now that it would be workable, especially if you thought broader than just things like Google drive. Throw in free blogging platforms, pastebins, free email + attachments, etc, and a bit of PKI (obfuscate) + redundant copies.
That would allow for real world use without having to rely on things like "pinning".