So you were ~10 years old. I'll assume not a heavy user of Open Source software, at that time.

Edit: 2001, I see one (1) banner ad, and that ad was seemingly for an OSDN (Open Source Developer Network) conference. https://web.archive.org/web/20010517002942/http://sourceforg...

Given SourceForge only hosted Open Source software, and had no source of revenue beyond ads and sponsors for quite a long time, AFAIR, I think they get a pass on a banner ad.