This fare has been around for ages but is difficult to use. P availability ex-TYO is often scarce.

In addition to the limited crediting opportunities for ET P fares, at least they do credit to UA at 100% now. For those wanting more crediting opportunities, there's a D fare that's still quite reasonable, but not really close to this price point. Once you get into that range there are other comparable fares from CAI on other airlines.