When going to the Klei website through the 'check shipments' button in the supply closet, I am able to login to Klei Entertainment through Steam. When I try to set up the newsletter subscription e-mail to unlock that reward, I encounter this issue.
1. Click the 'subscribe to our newsletter' link in the relevant rewards claim box on the website.
2. When forwarded to the settings page, enter a valid e-mail.
3. Be forwarded to a page declaring that the e-mail has been validated.
4. Attempt to claim the reward - does not work.
Following the 'subscribe to our newsletter' link again forwards to the settings page, where the e-mail field is empty.