What I will never forget is this allegory that Mr. Truntschka - a famous German ice-hockey player - told me about Direct Response Marketing. Imagine a forest with targets. It is too much work to go in and ask each and everyone whether or not he wants to buy your product, that does not work. Instead, put up a loudspeaker, shout into the forest, and wait who comes out. Only to these sell your product. That is so much easier, they have qualified themselves.