In many places the band name shows up as wMerchandise. I get that this is a visual pun on the WM, but I am uncertain how to credit the various releases.
(Strange Songs) In the Dark (2010) has "Merchandise" on the spine but "WMERCHANDISE" on the back cover.
A Corpse Wired for Sound (2016) has "WMerchandise" in several places.
The Facebook page is @wmerchandise but uses the band name "Merchandise."
If anyone has a definitive statement, please post it here.