Transmedia Network Inc., the discount dining card company, and the Signature Group, which offers credit card enhancements, are upping the ante in the competitive frequent-flier business with two new programs aimed at travelers who dine out often.

Schaumburg, Ill.-based Signature Group is tapping into United Airlines' most profitable customers - those who fly a minimum of 25,000 miles a year and are members of one of the airline's three Premier travel programs.

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