Same scam has paid for every one of my vacations, including my wife an I recently flying First Class on BA and AA from New York to Johannesburg. Though, like most elite fliers, I accrue miles by flying for business, so by adding an AA credit card, it nicely pads my account. Plus, if you have a citi gold checking account they waive the annual fee...every year.

The credit cards are marketed in a deceptive way, and unless you're a hardcore frequent flier or a big spender, probably not worthwhile.