Well, the VERY first site was Bianca's Smut Shack back in late 1995 when I was pregnant with my first child. I didn't realize what hotlinking was back then nor was I even aware that there was a charge for hosting sites. I'd never heard of "bandwidth".
At least I never posted any pics, I just looked at the ones other people posted.
The first site that made me realize I could make MONEY in porn? Cybererotica. I clicked a CE banner (LOL) that someone spammed on the Smut Shack and I saw the webmasters link at the bottom and said, "You mean I could get PAID for thiS???" WOOWOO!