That wasn't on that page when I opened it, you think I'd miss that? They were reading the comments here and updated the page after I wrote the comment.
The price was $4700 something, now it's $4945.
They simply smooth over it with this:
"So we will be using a rig cost of $4500 in our spreadsheet."
That way their overall math doesn't change. Should get banned for doing things like that. These guys are up to no good.