[Physique] Peоple whо referred 10 friends tо the Procter & Gаmble website for Physique shаmpoo received а free, travel-sized styling spray and were entered in a sweepstakes to win a year’s supply of the shampoo. The promotion generated 2 million referrals and made Physique the most successful new shampoo ever launched in the United States. To accomplish this, P&G used