From their forums:
Last week we sent out the first ever email newsletter to all customers on our existing website database. It was a huge step for us and ticks off another feature that has often been requested by customers over the last 8 years.
We don't 'do' spam. If there isn't a release, promotion or competition running that month then you won't get an email. We anticipate it taking a couple of months to settle down into a regular pattern and we are inviting customer feedback as to articles they want to see (links to new painting guides or sculpting tips from Kev perhaps) or if the balance of images and text is 'just right' or even if we are fair to send out promotional codes just to those who have subscribed to the newsletter.