Why are animated shows Invader Zim and Rocko's Modern Life so popular?

There were/are so many cartoons that were/are far better than Invader Zim and Rocko's Modern Life. I still don't get the popularity fad of these shows, can't walk into a Hot Topic without seeing GIR everywhere. For me Invader Zim and Rocko's Modern Life where mediocre, relying on being... show more There were/are so many cartoons that were/are far better than Invader Zim and Rocko's Modern Life.

I still don't get the popularity fad of these shows, can't walk into a Hot Topic without seeing GIR everywhere.

For me Invader Zim and Rocko's Modern Life where mediocre, relying on being 'weird' for shock with all around subpar writing.

Seems everyone who wanted to be 'alt' is obsessed with these shows.
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