New York City startup Ethikus provides vouchers for small businesses whose practices embody principles of sustainability.
Groupon's stock hit an all-time low last week, and the company has been hit with a lawsuit from shareholders for dishonest business practices.
Groupon has yet to carve out a competitive niche for itself in the market, and it never should have been a multi-billion dollar company.
Yelp stock soars 60 percent on its first day of trading. But the track record of recent technology IPOs is not encouraging.