I think it's unfair to pull that post out of the context of it's thread. The OP in that thread was expressing frustration at selling a bike and bike4ever gave her some advice.

I've sold a couple of bikes on craigslist and some cycling stuff on ebay. And you know what, I cut and pasted from old ads, which served as a "template" for newer ads.

In my view, "commercial" would have been bike4ever listing her (non-existant) bike selling company or soliciting to sell the OP's bike for her. She did neither. She merely offered advice that was appropriate to the thread. I honestly don't see how you get "commercial" from the post you linked.