I use Pinboard, and pay for the archiving option. I even periodically request a tarball of the archive for my own backup. Pinboard archives the entire page, not just a readable version of the content. For archival and reference purposes, I like this. It would be nice if Pinboard also provided a readable option. In fact, a number of the apps that work with Pinboard add support for readable versions.
I will look into adding Wallabag into my workflow.