Yeah that'll be great for the same 20 tryhard whales that rank well every week and essentially pointless for the rest of us.
You still get rewarded for being top 100, and because not that many people do em, it isn't hard to hit top 100. But top 20 is rough, because of exploiters, like some of the times on Dragon Sanctuary are definitely not legit, since properly activating those pressure buttons is going to take more time than their times. Most likely glitching through the floor and skipping alot of the mechanics. Seen videos of those and Lilipa time attack too.