Hope I don't get in toooooooo much trouble for bumping a very old thread

Saw mentions in some recent threads about "DHP" and Flyertalk search was useless and so this was one of the top results that my friend Google searched up.

Hopefully if anyone else is as confused as me what DHP means, this thread and the following links will shed some more context.

https://www.flyertalk.com/articles/w...en-flying.html

https://twitter.com/sulemaan/status/682514138573205505