Who says there is no more money to be made on the Internet? This guy started in 2003 when dating sites were already very established!
"We've written before about PlentyOfFish, a leading online dating site that is run by a single person and is raking in money. Markus Frind is the singular force behind PlentyOfFish. At the time of our last review, June 2006, PlentyOfFish was earning $10,000 per day from Google Adsense (around $3.5 M per annum).
I caught up with Markus today via email and asked how the business is doing now. He didn't want to get specific about earnings, but he said that POF will earn $10 Million + next year (which puts it at around $30k per day). So just in earnings, POF has grown rapidly over the past year or so. As well as Adsense, income now comes from banner ads and affiliate marketing. A May Wall St Journal article has a good general profile of Markus and his company."
The rest of the article is here.