I'm coming in late on the whole "Goodbye, Kyle" mess, but I saw this morning on Kyle's Insta account that she put up a explanation of the phrase and how she didn't think it would take off like it did, etc. I laughed at it at first, because IMO Ken has a history of getting up in people's faces (I'm thinking of Kyle and Yolanda specifically, even though Yo tried to make that more than it was) and is a bit of a loud blowhard, so the whole thing tickled me a bit. But now they're all trying to get everyone to do it and it just seems silly. I've seen the HoWives, Lois, kids, Kris Jenner, and more doing it. It just seems very try hard.
I will admit I was very surprised Dorit got in on it and posted her own video. I guess she is really burning all of her bridges with Lisa V. now. Although, I haven't seen PK doing it (unless I've missed it).