"Enhance" doesn't imply damage increase, it means "improve", as in it improves the skill. The text says "Gold Skillbloom", the icon is the exact same; how could anyone be confused aside from a gold bloom costing 1000NG?

I could see a brand new player not realizing that skillblooms only improve the trigger chance, but that's nothing new. Calling it "scamming" and "deceptive" really seems like a big stretch.