As the Agency Wank Tumblr shows, agencies trying to elucidate their point of difference can easily veer into cringeworthy business cliches and terrible jargon (Canadian agency John St, on the other hand, has consistently nailed it with brilliant films that mock current advertising trends). But direct and digital specialist Twenty, which has added a number of new clients and a host of new staff in the past few years, has avoided that self-promotional fate with an animated trip back in time to explain the power of the 80/20 rule to the world of business.