I don't get what all the fuss is about. If someone is providing a product or service (it's quite clear to me the mods in question are the IP of the author, regardless of tools or anything else; the EULA is another story) and wants to request donations for it, then I don't see why this is a problem.
To be quite frank I'd have donated for Cursed Armor, even the CN version, if I knew donations were requested and had instructions (in English) about how to do it. Like I said before, there's quite a few mods I would pay for, and judging by Cursed Armor (which is the only one I've played) wolfzq's mods fit in that category. I'm just not comfortable doing it via google translate.
Of course the optimal thing is if authors want to release their work free of charge, but I'd say it's understandable if they feel their time and effort spent is worth a nominal donation. 30 bucks is really not that much. Hell, it's like three months worth of your favorite MMO. In my opinion, donationware mods are MUCH better than the retarded post-shit-to-get-purple-stars gimmick the Chinese modding forums have got going.
tl;dr: From our perspective surely it's the authors choice what to do with his or her work. I donate to the AdBlock author monthly because I enjoy his product, and I'm sure I would enjoy these mods as well.