Imports from "donland.ru"

(Please excuse me writing in English - I don’t speak Russian)

I found several imports from “donland.ru” with quite strange tags like on this node:
https://www.openstreetmap.org/node/6046750747

Дата регистрации лицензии = 21.06.2000
Номер лицензии = РСТ00763ТЭ
Срок окончания лицензии = 30.06.2019
Статус лицензии = действующая

I asked the author about it in the changeset comment:
https://openstreetmap.org/changeset/64298053

Now I see several issues here:

Could somebody clarify these issues?
Thanks!

mueschel, these problems exist. Also this website forbids commercial use (http://www.donland.ru/Site/?pageid=92376). Anyway, donland.ru is an incompatible source.

Thanks! Do you know whether DWG is aware of this? I think due to the amount of edits there should be some official action.

Any contributor can revert the changesets using incompatible source.