“ Virality is something that has to be engineered from the beginning… and it’s harder to create virality than it is to create a good product. The reason that over $150 billion is spent on US advertising each year is because virality is so hard. If virality was easy, there would be no advertising industry. ”

Josh Kopelman

“ All good things are viral by word of mouth ”

Aaron Patzer

“ In real estate the wisdom says ‘location, location, location.’ In consumer Internet, think ‘distribution, distribution, distribution.’ ”

Reid Hoffman

“ [A virus, like viral marketing] can’t be lethal because if you spread the virus and it kills you, you can’t spread it anymore. That’s just bad news… It has to be really fun. This is why venereal diseases are awesome. ”

David Hornik