Groupon used to be hugely popular with its deal-a-day coupons and vouchers, but that old business model has faded in recent years, causing the company to look at other ways of reaching out. The answer it seems, is simple – it Groupon now acts as a kind of Yellow Pages 2.0, providing all kinds of business listings on its site. The good new is that Groupon is still offering its discount vouchers, the only difference is that they're now integrated with the business listings. In other words, you