Download Cap for Mods?

I've been attempting for some time to add YUNG's Better Ocean Monuments (https://www.curseforge.com/min…an-monuments-fabric/files) to my server, but each time I've tried to recommend it, the Aternos UI has told me it's not popular enough. The 1.19.2 version has almost 170k downloads, and almost all of YNY's other world generation mods (with similar download counts for 1.19.2) are available for Aternos. Is this a bug or am I missing some context?
Cheers.