That's great. You parrot the company line.

Consider this: as a proud EBG you might fly from ORD on UA. The entire terminal (with maybe a few LH flights) is UA and you can use the premium security, so we can say that UA "pays" for it directly or indirectly. Does UA say, sorry Mr. SAS, you can't use the premium security because SAS didn't "pay for it"? No, they have the courtesy of allowing you use the "UA funded" security at ORD.

Same thing with MUC and LH. At Haneda, ANA has a very nice premium check-in area with security and direct access to the lounge. They "pay" for this. As an EBG you are welcome to use it.