> Getting a domain listed is pretty hard.

I disagree. I've made two PRs [1] to that list to add domains where we assign subdomains to mutually non-trusting parties to ensure proper cookie security for these.

Both times the turn-around times were less than a week. In my first PR I even made a small mistake, because I did not read the instructions correctly. I promptly corrected it (< 5 minutes later) and the maintainer then merged my PR like 2 minutes later.

However we properly researched what the PSL does for us and what it does not before filing the PR. Also the domains do not hold anything other than customer data (similar to github.io).

[1] https://github.com/publicsuffix/list/pulls?q=is%3Apr+author%...