And referall redirects?
All referral redirects from what I can see. If you search for something and hover on the links it has a "r=bitcoin.com" at the end.
Its def a step in the right direction
Ref. spam is a step in the right direction? They could have done this without the referral part and it would have been much better.
Not sure I understand what you mean by referral "redirects". This is just an id (text string) for our API to associate which Search Partner is submitting the relevant query. It could just as easily be "btc", "abc123" or "Lauda".
You can try it for yourself:
https://spendabit.co/go?q=suspicious&r=Lauda