Experience has taught me that advertisers get the best results when they pay their agency a flat fee. It is unrealistic to expect your agency to be impartial when its vested interest lies wholly in the direction of increasing your commissionable advertising.
David OgilvyThe worst fault a salesman can commit is to be a bore...... Pretend to be vastly interested in any subject the prospects shows an interest in.
David OgilvyLike a midwife, I make my living bringing new babies into the world, except that mine are new advertising campaigns.
David Ogilvy