Chrome Steel - Gamepass-discount

Why exactly are Chrome Steels exempted from the 10%GP-discount now? Benjamin had the same issue while the Theron Guard before that was 10% off.

It’s insulting enough that you can’t buy them with Iron anymore but this is on anonther level.

I would love some input from @TC_Sera other than “blabla contact support”. Support clearly won’t help me with the current respond time. By the time I might get a response the skin will be long gone.
" For game DLC and add-ons, Xbox Game Pass members receive up to a 10% discount from the day the add-on is released."
Further questions about Xbox Game Pass can be found by asking Xbox Game Pass.