Are B2C companies starting to see a decline in viral growth responsiveness? That’s what Greylock’s Growth Advisor Casey Winters and Head of Rider Growth at Uber, Andrew Chen believe. Andrew coined the term The Law of Shitty Clickthroughs to describe the idea that every ad channel and every marketing platform eventually sees a decay in responsiveness. Due to increased consolidation and competition, viral growth is now much harder to break through and in the long term will see a break down in effectiveness.    In this episode of Greymatter, Casey and Andrew riff on why consumer growth is getting harder and more expensive, and what viable opportunities companies can leverage in their own growth strategies. Both Andrew and Casey have a deep background in growth. Andrew advises and invests in tech startups including Barkbox, Dropbox and Tinder and for the past decade, he’s written extensively on mobile, metrics, and growth. Before heading growth at Pinterest, Casey ran marketing for Grubhub.   Casey and Andrew share actionable growth strategies for startups, current trends in paid acquisition, and why they are excited for the rise of enterprise viral growth. For even more growth advice, be sure to check out Andrew’s blog and Casey’s blog.