It's only 'amusing' when you first hear about it. Once you understand it, it's stunningly brilliant. Basically involves flying in paid J for 50-75% less than econo fares, with complete flexibility, COS bonuses, lounge access, etc. Legally.

Forget the search, just go to Summary of MHD posts.

BTW, the reason I asked is that ORD-GDL is a particularly useful segment for people departing Vancouver, BC.