Ouch 20k over sticker is crazy, hope no one pays them extra for it. Most of us have been getting our iX's at MSRP so not sure why they think selling it for 20k over is smart...
Not sure how prevalent, but thankfully the Houston-area dealers aren't doing such a markup. $15,000 markup for an iX50 and $20,000 markup for an iX60. I'd find another dealer!
Check out Autonation.com for dealers under their management; they are required to stick with MSRP, although I did find Encinitas, CA dealer not abiding by it. I just bought mine last week from Valencia with no games in pricing. If you go to the independent dealers like Irvine, CA, they are the worst price gougers!
We went to a Ford dealer looking at a Mach-e GT Performance Edition and they had a stock 18.5% "market adjustment" on literally every vehicle on the lot. When I told them that I would rather take my business elsewhere than buy anything with a market adjustment they told me "literally every dealer does this, even Tesla". Nope. Our iX60 on order at Fields BMW in Lakeland has no market adjustment at all.