Michael Arrington Invented Groupon in 2005 (Idea 4)
techcrunch.com
techcrunch.com
That's not to say that I disagree with you that the builders deserve good equity as well.
It popped up on Techcrunch a lot before GroupOn, ie. how is it that the $170B local ad market has been left untouched by the web?
The word 'invented' here is a vocabulary failure.
Idea means almost nothing. Execution is the hard part.
anyway, I would hardly call having an idea an invention ... the invention is the implementation of that idea, which is worth nothing until it's actually implemented ...