Yes, I am starting to realize that. I am a recent convert to adult sites - coming from place where I never even bothered to check about bandwidth.
Now I find dreamweaver is getting me into trouble - as I can make galleries fairly quickly. I still am making money, but I am going to have to start optimizing stuff more. Even compressing html pages can save.
I just got my first notice from my old hosting - where I only have one adult site with decent traffic - that I am about to go over for the month already. It was a bitter sweet moment for me
Kinda brought a tear to my eye...