Hi Giff -
First, my apologies for taking more than four and a half years to reply. You asked your question back when I wasn't giving the site much attention. I only noticed the topic because a guest was viewing it when I looked at the Who's Online page a few minutes ago.
I've been including Amazon ads on the pages for years, and a some point (I don't remember when exactly) I added Google Adsense ads at the bottom on the pages, where they wouldn't interfere with the content of the pages. I don't make much off of either of them (roughly $100 a year from each of them), which does help offset part of the cost of keeping the site running.
That's the most I will ever allow on the site. I didn't create ThreeStooges.net to make money off of it; it exists to celebrate our love of the Stooges, and to share as much information about them to the world as possible.
- Rob