Earlier quoted context omitted.
I am with you on how misplaced the enmity towards --- well, at least Groupon. But there have been well-known public companies that did badly that were essentially scams, such as during the channel stuffing scandals of the late 1990's. So while I sympathize with your irritation at the "Groupon is a Ponzi scheme" meme, the last sentence of your comment is simply wrong; it's wrong directly (a counterexample would be San…
If anything that supposed counterexample supports my point that the accusations these people casually make in HN comment threads are so much more drastic than they realize that they're their own reductio ad absurdum. Running a public company that's a scam tends to entail criminal behavior. Especially nowadays.
The key point here, I think, is to be very careful to distinguish between a failure to build sustainability, and willful maneuvering for maximum personal gain at the expense of sustainability. The former is a noble failure, the later is deeply unethical (if not illegal) and ne'er the twain shall meet!