> Weird, why are they so shy about mentioning they're Russian on their website?

There are currently sanctions against Russia. They're not comprehensive, but many companies won't want to use a Russian company just because they don't want the risk that more stuff will be banned later (never mind the hassle of figuring out whether what you need to do is banned already)

Because in the west Russia has long had a negative association with computer misuse, in general the response has always been "Russia bad, don't do business, block everything" so a Russian company doing ddos protection garners the same jokes as av companies writing malware, unfounded but you know, them dirty Russians - this isn't really the case any more and hasn't been for a long time since Russia has not been a "safe haven" for at least a decade or so, despite the misinformation others keep posting.

Anyway this association means they miss out on business not only from legitimate clients, but also shadier sites who don't really want that association either. Also significant tax advantages.