The data is processed only for specific purposes.
Operator guarantees data confidentiality
Although I don't get any data. But you are free to provide any data you like. It's just that there is no way to do so.
The following cutting-edge technologies are used:
Google Analytics -- that grepping referrers is not really that comfortable any longer.
cookies - used by the former. Those cookies are typically placed on your browser. Cookies are only used for statistical counting (audience monitoring). Maybe I should look for a first-party analytics service? By the way: you're free to delete, modify or block any cookies you like. It's actually a common practice!