How to Say "No" Without Burning Bridges

Scale.

You hear the term often in marketing. It basically means increasing results disproportionately to the time or effort previously required to achieve them. Companies like Dropbox and Airbnb are often held up as shining examples of marketing scale, which they accomplish by hardwiring user referral incentives into their products.

via HubSpot Marketing Blog http://bitly.com/1IA9Ctm