design is cool, but...if the poster is unused, then it shouldn't be posted on this site. i learned that lesson the hard way with posters 2 weeks ago. clay will want to remove it if they did NOT actually get used. sorry.
you made the original match book image your own & in doing so made a cool image. kinda ironic that that process sounds kinda familiar...
csa shouldn't be blamed for starting a collection that quite likely has saved images from obscurity. i wouldn't let this rare chance keep you away from a fun resource for creatives scrojo.
i'm pretty sure every designer/artist has done that very thing at one point or another in their career. i guess if one finds it morally wrong, don't use their awesome collection. ever. for anything.