All paid seating is subject to availability at time of request. (travelingformiles.com)
You can then forward a copy of this agreement to the credit bureaus to increase the processing time of the request. (creditrepair.org)
Fare class is only relevant if you book the most expensive Y or B economy class fares as just discussed; all other fares are processed after these passengers and are sorted by time of request only. (rewardexpert.com)