the cases are custom made, anybody can order them from synology and use them for what ever.
after a few mails with their support i found out that i can also pay in cash at their office. to me it doesn't seem to be a scam to be honest. suspicious yes, but can't say something for sure. don't know how you people are so sure. tomorrow i'm going to their office and pay in person cause they are just a few miles away.
i'll be back with details.