I would like to know how many ways there are to make money online (just doing some research for an article), thanks.

Selling any product there is from a web site

Sell things off a auction type web site

Own a wonderful site and sell advertising on that site.

Design web sites

Do customer service from home for some companies

There are illegal activies, scams to steal ID's dating scams and more

Here are a couple more:

Selling services (rather than products)
Selling memberships or subscriptions

Hello Junkie:

Actually selling advertising is the way the billions are made. See the ads on this website?? They make THIS owner a very good income.

excon

I would say there are 42 ways

Thanks everyone; selling advertising is a good way to make money online but only if your website has a lot of traffic and I am sure everyone here knows that getting traffic is one of the hardest things to do!
I write articles, blog and display adsense ads, am a member of one get paid to read emails websites (which is probably a scam because they pay me a fortune to read their emails!), Squidoo, affiliate marketing with Clickbank and post on 1 get paid to post forums (that's about it!).