I haven't had direct experience, but would like to offer my thoughts.
To me, it looks like article marketing would only really start to pay off once you've established yourself as some sort of expert within the web hosting industry. One or two articles in the hope of gaining some free advertising may get a few clickthroughs. However, if you're in it just for the free advertising, then I think your limited time would be better spent improving your products and services and delivering value to your customers.
Again, just my

.