Interest in mobile gift cards on the rise with several new venture-funded entrants including Plastic Jungle, Giftango and others. Market research firm, Tower, estimates that the face value of mobile gift cards could reach an aggregate total of $1B in the next year. RPX has sublicense rights to the Actus portfolio (now known as Abridge Technology) that is currently being asserted against mobile gift card providers. Abridge Technology [NPE] filed suit against Metro PCS and 29 other companies over four patents related to prepaid electronic tokens, including prepaid cards and gift cards on March 17, 2011.