But you're also running a huge risk because if they find you in violation the fines start to get nasty. We had a client in the UK that was providing hit/redirect statistics, including full IP addresses, to German clients. Under the rules that is illegal - they were fined in the region of millions of euros for it.
Germany's privacy laws are known and probably available in multiple languages. The concern here is that you might not know the law either because you can't read it, or it only exists when the government wants it to.
But you're also running a huge risk because if they find you in violation the fines start to get nasty. We had a client in the UK that was providing hit/redirect statistics, including full IP addresses, to German clients. Under the rules that is illegal - they were fined in the region of millions of euros for it.