So you dont have to check each category/difficulty/co-op/whateverelse to find where is actual run...

For example Remnant 2 showing 1 active runner, but i simply cant find any. If runner deleted his run - okay.

Or even better - just add number of runs to categories name like (1), (2), (3)

I don't agree, it made the leaderboards look ugly and confusing

Also, the only run in that game just got verified 2 hours ago

Ugly is debatable (IMO if it bothers you then the real problem is that there's too many dead categories on the leaderboard), but how was it confusing?

not showing the "empty" makes it even more confusing than before

there are games with multiple empty categories, that you won't waste time clicking on if you can see the "empty" label straight away

I agree that it does not look pretty, so how about having the font of empty cats be greyed out?

There are other ways to designate (empty) without the ugly text

They could, for instance, grey out the text color as shenef said. Or add a different symbol

I agree that adding "(empty)" to empty categories takes too much space, but reducing the opacity or making the text look gray would be really good. I also support displaying the number of runs in sub-categories.