Purple CowBy: Seth Godin You're either a Purple Cow or you're not. You're either remarkable or invisible. Make your choice. What do Apple, Starbucks, Dyson and Pret a Manger have in common? How do they achieve spectacular growth, leaving behind former tried and true brands to gasp their last? The old checklist of P's used by marketers Pricing, Promotion, Publicity aren't working anymore. The golden age of advertising is over. It's time to add a new P the Purple