Again, I am sorry that we could not accept your accounts. Every day, we also reject a large number of accounts from German and European users if there are red flags. (And unfortunately, there are some real situations that are logical that can lead still to false red flags.)
For example, I have an unusual last name, especially for here in Germany, and when I have done personal shopping, I have had a number of online e-shops reject my new accounts because that looked suspicious or because they didn't think an address I wanted to send something to was real. So I understand that your frustration is real, and I am sorry for it. --Katie
You are the only business I have ever tried to use that straight up rejected me with no explanation, and obviously it's a huge issue as in just this one thread there are multiple people saying the same thing, so there must be thousands if not tens of thousands of legitimate customers you've turned down.