But at that point in the interview you've just mentioned that you made $1-$3 per user, with millions of users active each month, and you were paying 10 cents for a portion of those users. Of course the first thing people are going to is the math and realize there's a lot of money right there.
But back to why I posted my original comment, it was more the condescending tone of the "I'm amazed" part of that sentence. My gut reaction would be: "Why yes, I can multiply in my head and it is amazing, Andrew."
Thanks for your reply though, nice to see you in this discussion.