While Groupon Inc ( NASDAQ:GRPN ) may be offering its merchant partners questionable benefits, it will try to make payments smoother by unrolling its new mobile payment technology. Businesses can now use an internal Groupon system to accept credit card transactions. The service is free for merchants that offer daily deals and is accessible through a fee for other merchants. [BANNER] The technology has been tested in the San Francisco Bay Area and when it unrolls, it will compete with eBay Inc ( NASDAQ:EBAY ) leading service PayPal and Twitter service Square. All three technologies will allow merchants to also process credit cards through their mobile phones by using a small card reader device. Groupon intends to compete with lower fees to outside merchants. Groupon will charge 1.8 percent of the transaction value plus 15 cents for MasterCard, Visa or Discover, and American Express cards will ask the merchant for 3 percent of the transaction plus 15 cents. The news shot Groupon stock up 26 percent in midday training, and up 6 percent total for the day to $4.95. Still, the stock is 75% below its IPO value of $20. The fall in value moved Groupon founder out of the Forbes 400 richest men in the USA. Eric Lefkofsky lost his place only a year after making his debut among the richest, along with Zynga Inc ( NASDAQ:ZNGA ) founder Mark Pincus.                                                                                                           Advertisement   IMPORTANT ZNGA UPDATE : September 20th 2012 - ZNGA is making a chart pattern that has been seen 4075 times since the year 2000.  50.72% of the stocks that have made this pattern went up over 14% in a 20 day period.  Watch the video to learn more about the probabilities of ZNGA stock moving up or down.                                                                                                   >>Click here to watch the video and learn more