I’m thinking that environment and where you store your bike may be the bigger factors in fogging as people report fogging with and without the stickers.
In the year & half I’ve owned my GT I have never had any fogging. I live in north Texas about 300 miles from the coast, so humidity is not a big issue.
I also keep my bike in my garage when its not in use.
Quite possible, I had the stickers but removed them because of fogging and have had no fogging since.
I live within 1km of the coast
I don’t ride in the rain (car)
Bike is stored in a garage
I wash the bike with a freezer bag covering the dash, then damp sponge for the dials.
It can get quite humid here particularly after rain.