So I "earned" the Nothing Manacles that randomly dropped for me in a Nightfall this week but the whatever I purchase with the 21 strange coins from my two other Nightfalls wasn't earned? Disregarding the fact that 21 strange coins isn't enough to buy a weapon, I still literally put in double the effort for them as I did for the exotic drop I did get. Going soley by your qualifications I "earned" whatever weapon I purchase from Xur this week mich more than you "earned" your random drop.