Actually, I'd be more concerned about the sites that charge for the information they provide. There are so many free writing sites that there's little need to pay to read articles on the web. There are some good print magazines that require a subscription, but a many of those offer free articles on the web as well.
One of the reasons Fiction Factor is free is because we wanted to share what we'd learned and to help new writers avoid being scammed by some of the dishonest agents and publishers that lurk in the writing world.
Tina