Advertising is one of the chief ways that web sites generate revenue.
But be careful where those ads go. Place them in the middle of your copy, and you may end up with something like what happened with this Vancouver Sun story (I should add, it’s through no fault of Twitter-savvy reporter Gillian Shaw’s).
If you do decide to advertise within your copy, you might want to think about ways of styling ads distinctively enough (and with an “Advertisement” label) that your readers don’t think Michael Geist is advising them to click here to win.