Thanks for raising this issue. We wrote to all applicable customers last week as per the email you have seen.
We will appeal the region’s ruling as we believe it contravenes European law, although this will take time.
I can confirm that the ruling does not apply to affiliates based in that territory, but will of course apply to any local players you have brought in. As for the rationale behind you receiving the email, my guess is that you once set up a test account. Alternatively, we could well have run a script of all of our databases to pull off the details of those on it based in Nordrhein & Westfalen.
Thanks,
Tom