Well, here's some things you apparently missed:
>Of course, we have heard from merchants who felt Groupon sent them too many customers. We responded to those concerns by creating merchant preparation materials, including this video featuring a Groupon merchant who sold 10,000 bagel Groupons in a day:
and
>Also, to clarify one important point: it has always been Groupon policy to allow merchants to cap deals. If a merchant sells too many Groupons, they’ll have a bad experience, the customer will have a bad experience, and therefore, Groupon loses. We’re longer-term thinkers than that. In fact, we have the opposite problem more often – where merchants protest a cap we recommend, convinced they can handle more customers than we think they can.
and
>Now that we know Posie’s had a problem, we have reached out to them so we can help.
So they didn't specifically mention talking to the 3% that didn't want to do it again, but they most certainly did address the other concerns you raised.