How accurate is the gravity number on clickbank?

I just came across a product called "imjohnchow" and it launched not long ago and yet it's already 279.

But according to youtube, the video on his homepage only got 900 something views. This got me wondering, shouldn't it be hundreds of thousands views if it's a high gravity product?

Or people don't even finish the video before they purchase? Doesn't make sense to me.
Maybe there's some hidden secrets?

The gravity is accurate!
I can bet the site received dozens of thousands of hits!

The problem comes from Youtube!

Yes. it's pretty much accurate. It gets lots of sales according to this stats.