How do you think that would work? Like the site with the affiliate link should drop a third party cookie for gumroad? That’s a pretty big requirement.

But did you try in this case? Because it doesn’t seems to have a sanitizer handling gumroad, in fact the sanitizer list is quite limited.

All the solution you proposed have big tradeoffs. Most would require to run some code on the site where the URL is, which is often not an option. And they would not work if the link is shared between people. For a lot of cases the solution they used seems to be the best one.

The URL tracking filter list is nice but it doesn’t seems to include anything related to gumroad domain or parameters.

https://filters.adtidy.org/extension/ublock/filters/17.txt

You need to add it yourself.

I don’t understand. Cookies and request method are two different things. You can set cookies on GET.

This is about removing tracking arguments that identify users, this is not the case here.

The example in your link even show it’s keeping campaign tracking arguments. So I’m pretty sure it would keep the one we are talking about here.

Use removeparam.

The URL tracking protection filter list uses this and is a nice list to enable.

An uBlock Origin custom filtrer should do.