Do people really look at Kanye West as a "gangsta" rapper? A small matter but I find it interesting that the makers of the coin who I assume are either fans or at the very least familiar with his music labeled him as such.
Also, it doesn't look like anyone described him as such - the article contains the quote "like isn't he some big fuckin' gangster." The context is that he's making threats, albeit legal ones. So while the would-be creators of Coinye are certainly coming off looking like morons, they haven't made the particular mistake of labeling Kanye as "gangsta."