It would be great if it could be made more explicit whether pfl uploads overlay package data in addition to the main tree. I would rather not have the contents of my random foobar.ebuild uploaded :). I see the statement on the website: http://www.portagefilelist.de/: > Don't worry, your privacy mains protected as we are not collecting anything else than portage data, and we don't store who sends what. but to me "portage data" means everything that portage deals with, including packages from all repos, overlay or not. Mention of the gentoo / official tree or overlays would help a lot. Thanks for a great tool!
You should be asking the website operator for clarification of their privacy policy, it is not run by Gentoo.