If you notice on their XO variant, which is the cover to XO#1, the DCBS & IST logo are both stamped prominently on the cover of the dust jacket. I emailed them to ask specifically if it was on the dust jacket or just an image placed on the photos site to help showcase it's variant status.
Because the two logos are there I opted not to get the variant cover, went with the DM one. They seem to junk up what would've been a nice variant cover...imo of course.