is is involved in online development ?
Yes,it ran contests on Twitter, Facebook, and Myspace.
Publishers Clearing House
 In 2006, it acquired Blingo Inc., an ad-supported metasearch engine that was later re-branded as PCH Search and Win. PCH ran contests on Twitter, Facebook, and Myspace. iPhone apps for slot games and trivia were developed. The company created online play-and-win sites like PCH Games (formerly Candystand) and PCHQuiz4Cash, with air-hockey and video poker games.

where does publishers clearing house get their money from By selling merchandise, magazine subscriptions and operating several prize-based websites. what are these organizations ? It is a direct marketing company that markets merchandise and magazine subscriptions with sweepstakes and prize-based games. are they governed by any regulations ? Yes, by deceptive Mail Prevention and Enforcement Act of 2000, which regulates direct mail businesses. name some of their products ? The company has been selling books, media, jewelry and other consumer items since the 1980s.
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Publishers Clearing House [SEP] Online development
In December 2010, PCH acquired Funtank and its online gaming site Candystand.com. In 2011, PCH promoted a "$5,000 every week for life" sweepstakes in TV ads and the front page of AOL.com. The following year the company acquired a mobile marketing company, Liquid Wireless. The company utilized, then stopped then started again utilizing coregistration (through other websites) to expand its customer base. In 2008, a PCH spokesperson said the digital properties were intended to attract younger consumers. By 2013, the internet had become PCH's primary channel of interaction with consumers. "The New York Times" described the digital transition as "part of an overall effort to collect information on Web users, show them advertisements and use the registration information for PCH's mailing lists."