I'm surprised the option of moving the package to contrib got so little support. Many of these packages don't seem a good fit for Debian stable and its security-patch model.
ArchiveBox is fully FOSS but is almost unpackagable on stable because it depends on a mix of both pip, packages, npm, and chromium (which is only distributed via snap).
The core value provided by ArchiveBox is the integration of these disparate tools into a single UX, so it's stuck in contrib/ppa for the foreseeable future.
This is just one example of a FOSS package that doesn't fit neatly into Debian's distribution model, but there are many others.