Amway agreed to redeem more than $20 million in gift cards to settle a lawsuit claiming that they improperly included a redemption date.The suit accused the company and two related companies of misrepresentation. It claimed that starting in 2005, consumers in 26 states bought gift cards with redemption dates that could have been interpreted as illegal expiration dates.Under the terms of the settlement, consumers must file claims by June 20 to receive non-dated replacements worth at least $50.