Stewart and Thierry both make valid points. I had been collecting their prints since 2006 - I have close to 250 different examples for the five year period 2006 to 2010 (I never flipped a single one) - I reckon 90-95% were bought directly from them - it would have been nice to have received some acknowledgement of my interest, support and financial commitment over the years (particularly as I had the additional burden of international shipping costs) but I do not recall a single instance, other than occasional bonus posters in the early years, of this happening.
Why should they care? They have a successful business model and a voracious customer base. I stopped buying their posters in December 2010.
Mark