This puts services like Pocket or Instapaper under doubt.
While in a browser the "reader mode" or an and blocker may reformat content and remove ads, etc, it's done strictly for the browser's user, the modified version is not distributed.
But e.g. Pocket allows to share a "pocketed" article with all the ads and most formatting removed; they even advertise some articles on their homepage. This may count as distribution of a derived work. They of course give the credits and a link to the original, but I wonder if some publishers might be unhappy enough to challenge this.
While in a browser the "reader mode" or an and blocker may reformat content and remove ads, etc, it's done strictly for the browser's user, the modified version is not distributed.
But e.g. Pocket allows to share a "pocketed" article with all the ads and most formatting removed; they even advertise some articles on their homepage. This may count as distribution of a derived work. They of course give the credits and a link to the original, but I wonder if some publishers might be unhappy enough to challenge this.