At the 330 day mark, I tried booking J class award for Jan XXX-BKK,MNL-XXX for various US gateways like DFW/LAX/ORD, and got nothing for CX or JL. Trying on BA was the same story. Only options were hideously overpriced. Based on what I've been reading here and AA and BA I wasn't too surprised. I'll keep looking, but have resigned myself to paying cash; fares on JL aren't too horrid.