I would suggest putting it out as open source with a permissive license that don't require upstream commitment. Because you don't want to become a maintainer.

I would suggest putting it out as open source with a permissive license that don't require upstream commitment. Because you don't want to become a maintainer. Just make it clear that it is provided as-is, without support. It does after all represent a lot of value having been poured into it, worthy of a better ending than rm -rf, even if it didn't reach break-even.