Does anyone know if tickets purchase through discount sites like Kayak, Vayama, etc., are eligible? It does seem as if I can determine the fare class I'd be purchasing from those site in advance so looking for anecdotal evidence. Right now the same ticket (NRT-DPS on May 1) is about $200 higher on GA.com than these discounters but it might be worth paying the difference if it means I'm eligible for bidup.