Diamond Plus has been real but just the rules of entering remains a mystery (besides legacy invitational members, the rumor is top 1% spending DMs).

Maybe they are going to make it public, like PPS. Publicly declared DM Plus can only be attained by contributing $250,000 USD annually and only revenues from F/J fare counts.

This is interesting because I just realized since my company let's me travel in PEY and if I travel 8 times a year at PEY, with regional trips included it is not that hard to make $250,000 USD annual threshold. Of course, if they limits it to F/J cabin, then I guess to quote some DYKWIA here: "my money counts more than your money because I travel only in F/J even if it ends up to be the same amount"....

Anyway, maybe it is coming this way: Diamond Plus is the "new Diamond", Diamonds are the "old Gold" and all watered down after that....