I don’t really remember how it began. But sometime, maybe five or six years ago, I started sending birthday cards to anyone who wanted one. No charge, no rules – just send me your snail mail address and when your birthday rolls around I’ll send you a funny, personalized card. It seemed like a pretty good marketing idea: Snail mail is an underused channel, so the cards stand out. Everyone has exactly one birthday, so while it applies across the […] Click to read more…