> 75% of people (85% if you include mobile) abandon your site at cart checkout - that's a trillion dollar problem in the US each year.
Well, I can see at least two problems with that claim.
First, anecdata, I'll often be forced to get to the checkout stage just to find out what shipping is going to cost me -- this may be more a problem in my region (Australia) where shipping can be onerous, and vary wildly between vendors, so it's an inevitable, but quite time-consuming way of comparing total costs.
Second, even assuming that number is accurate (it's not clear how he got there) those trillion dollars are very much part of a zero sum calculation. It reminds me of the old hyperbolic claims that piracy was removing billions of dollars from the economy.