Mmm...travelcomments, if it's any consolation, sub-W inventory (S,T buckets etc.) on UA are becoming increasingly rare as UA continues to hike prices and reduce the number of low-cost seats available. So, with any luck, perhaps all the cheap UA fares will be wiped out soon and your e-cert will work on all the available fares (since everything left will be expensive). Not a good outcome IMO, but at least it solves your problem of wanting your cert to apply to the cheapest available fare at all times...