Members of User 2500
It's the opposite, you should add to this template all the categories containing "users with x contributions" where x < 2500. And no, it wouldn't make sense because it would clutter everything too much. But this is like babel templates, so we could make a single category with reversed order, see e.g. m:Category:User en.
I am still somewhat uncertain that you get what I am saying. Alice has 3000 contributions, Bob has 5600 contributions, and Eve has 17000. What I suggest is that "Translators with 2500 contributions" contains all three of these users. They all have at least 2500 contributions, so this makes sense. Next "Translators with 5000 contributions" should contain Bob and Eve, and "Translators with 10000 contributions" should only contain Eve. I don't see how this clutter things too much. Yes, the category with 2500 contributions-contributors would be very large, but that is how things is.
Translators with 2500 contributions
- Alice
- Bob
- Eve
Translators with 5000 contributions
- Bob
- Eve
Translators with 10000 contributions
- Eve
Another way of doing it could be to put in a link to the next category in "Translators with 2500 contributions". So it looks something like this:
Translators with 2500 contributions
- Alice
- Translators with 5000 contributions
- Translators with 10000 contributions
Translators with 5000 contributions
- Bob
- Translators with 10000 contributions
Translators with 10000 contributions
- Eve
Personally I would prefer to put all the users in this category instead of links (ie the first proposal in this reply)
Yes, I understand. What you want (in your example) is: Eve with 1 template, 3 categories; Bob with 1 template, 2 categories; Alice 1 template, 1 category.