oh, probably because you're trying to pass this poster off as a project of as much merit and integrity as 99% of the rest of the poster efforts on this site, when it's actually a perverse sham, flagrant deceit and deliberately dishonest fraud.
oh, and the reason those finicky fools are buying your gigposters is because they think they're "modern psych posters". you have to admit, if you didn't know diddley squat, they actually do look like psych posters because they have so much COLOR.
i constantly get contacted by psych poster dudes (collectors, dealers and the like) who ask me to explain punk posters to them. it'd be funny if it weren't so damned stupid and insulting. these are the guys who control YOUR market. and they sell things because they LOOK LIKE psych posters.
hint - wanna make money in gigposters? make them look colorful, hand drawn and (preferably) psych so those finicky fools think they're collectible. easy.