It took me more than 5 minutes, reading through more than half the article, and watching the video clip in its entirety, to realize what this blog post what about. Is this good writing?

In the end, the proof is in the pudding. Is this selling cars? It's very hard to measure the marginal effect of one ad, but to the extent that we can do it, this is what the yardstick of advertisement is.

edit: putting -> pudding typo