Unless Bungie is at your house robbing you, or picking your pocket, you control what money you spend, and where. If you buy something and like it, i would think buying more of it will likely be a good thing for you. If you buy something, and not like it. Buying more is a likely going to not make you happy. If you keep buying it after you are unhappy with it, IE milking you. Then you shouldn't be allowed to spend your own money.
Give this man a -blam!-ing medal
Hehehe, the last line made me chuckle.