I was sent an email saying it's been 6 MOnths since registering my purchase (bluetooth MX 1000MOuse, and MX5000 board), and just saying thanks for the purchase and hope all is well. There's also a link to take a survey. I needed to have a look on their site anyhow so clicked through. £10 discount code has just been emailed as a reward for taking it. So, you may with to do the same. I think it was only about 5 questions.