If you go to the mod page in question (don't donwload): https://www.nexusmods.com/baldursgate3/mods/550
Click on "Permissions and credits" to expand the drop down menu. On the bottom of that there's the point "Donation Points system", which this particular download is opted into.

I suggest to report this mod for abuse so that the Nexus staff can actually do something about it.

Seems legit, Norbyte is a name I recognize from Div modding days, doesn't surprise me that they've written some of the key scripts for BG3 stuff.

The new mod does at least credit Norbyte/fig/etc, essentially reposting their work with SEO and monetization is more than a little scummy, though. (I also don't know how to tell whether or not a mod is monetized, and if it's not I don't really care. But don't really have reason to disbelieve that particular claim. /shurg)

Looks like the linked mod was pulled!