According to a Bloomberg article
Groupon Chief Executive Officer Andrew Mason, who started the company in 2008, had concerns about the strategic direction it would take under new management and what could happen to his employees if he sold to Google, according to a person familiar with the matter, who declined to be identified because the discussions were private.
If there was ever a chance to ‘take the money and run’ this one was it. Why? In my opinion, it’s because although Groupon has the lead in the online deal space right now, it is more about being first rather than being better or, more importantly, hard to replicate.