I was very heavily involved in online advertising sales from 1999-2002 (my site was adcertified.com), and that was when pretty much anyone could make money buying and selling banner ad space. I was 18 years old, my partner and I were making about $12,000 per month, each! The golden era of logging onto the internet and going to the mercedes dealership an hour later are OVER! When we finally sold the company I walked away with a 2 houses, 3 cars, a motorcycle, a month long vacation in South Africa, traveling throughout Europe, several cruises, and a lot of great memories.
There is still plenty of money to be made on the internet, and there are plenty of people making an ass load of cash. Look at luxury4play.com, and you'll see pretty much an entire site of people that made their fortunes from various internet companies. Those guys all have ferarri's, boats, huge houses, etc. I'm still making a very good living on the internet, but it's much harder work than 8-9 years ago.
With that said, in the great words of Chamillionaire, "The rich ain't gonna show you how to get rich, and the poor act like they're the richest people alive." G'luck