I just put a reservation on hold on aa.com and received this up-sell offer. Pretty smart idea:

"Note: This is not a receipt. Fares are guaranteed up to 24 hours. This reservation will automatically cancel if not purchased by the date indicated in the status field.

Need more than a day to decide? Extend this hold and guarantee this fare for 7 days for only $20 per passenger.

Use the record locator below as a reference
Return to AA.com within 7 days to purchase your itinerary
*This product does not apply toward the purchase price of the fare and is non-refundable. This offer may only be purchased at the time of initial booking."