Update 4/1: despite indication from Amex that this would end on 3/31 the 50k bonus offer remains active. Get 50,000 membership rewards points when you spend $1,000 on a new American Express Platinum Card within 3 months of signup. The points are worth over $1,000 if well-used. The Platinum is the grand old dame of charge cards, chock full of prestige and benefits but weighed down by the hefty $450 annual fee. Savvy consumers can take away much more than that from its benefits, though. In addition to the 50,000 points, I just applied for one myself because of benefits including their $200 credit again airlines fees and free airport lounge access for American, Continental, Delta and US Air.