You start off by writing an interesting, informative article and then you post it at one web site complete with your full contact details in
resource box. Now rules for free articles are that anybody can pick up your article and re-post it at their web site. So from a single web site, you may find that your article has been re-posted in dozens of other web sites within a very short time. So let us assume that you started off with a batch of 10 well written informative articles and on average each one gets re-posted in about a dozen other sites. This means that you will now be having 120 hybrid ads (this is exactly what online articles are) out there where your prospects are bound to come across them.
Assuming that 5 prospects read your article every day, you will be enjoying traffic of 600 visitors per day. Not many web sites see that kind of traffic. And we have not even talked about ezines and high traffic blogs or web logs that may find your article interesting enough to re-use.
Then there is something else to consider. Once your article is out there, viral effect will continue for as long as your information is relevant which could be quite a number of years. And existing articles will continue to get read and pull in traffic for your affiliate program for years.
