You used to be able to get an AMEX Bluebird card and load it with Gift Cards you could purchase at
Walmart. You would use your credit card of choice to get the points with the purchase of the gift cards. The monthly max was $5000. Then, you would set up the Bluebird card to pay your bills and just pay off your credit card bill.
So, you get the 5,000 points and never pay anything except for the service fee on the gift cards ($4.95 or $5.95 per gift card. But, you find the Visa's that you can load up to $500 on to cut down on the service fee expense).
Voila...manufactured spending. You get all the miles and spend very little. The problem is they have all caught onto the scheme and they shut them down. It is much more difficult to manufacture spending now.