As long as people want to read what you're publishing, publishing is free. And fast. Around the planet. The web is about to get way better, and IPFS and its competitors are going to be what pushes it forward.
In the very near future, the entire New York Times archives will be fetchable just by asking for it. Your computer will ask your neighbor for the front page for July 21, 1969, and they'll send it right over.
Yeah-- the IPNS records have a notion of recency, as well as being able to write version history datastructures (e.g. git)
The only reason GitHub is an intermediary and single point of failure is because it's much more convenient than raw git. There's nothing that stops you from dropping your git repo on a webserver, Amazon S3 bucket, or any other data store. Heck, my last startup used Heroku as our master git repository because we didn't want to pay for a private GitHub repository.