engine - 9:36 am on Oct 15, 2013 (gmt 0)
I'd certainly want to identify whether it's the market that's gone, and why, or if it's other factors, such as the site itself.
How are your competitors doing? Have they swept up all the business, or are they, too, struggling?
How has the market changed? Does it require additional items? For example, I was looking to buy a specific product for a project I was working on. I found a supplier, but, they, unlike their competitors, didn't have some of the other parts for the project. The site that supplied the associated products got my business.
Ad click from ads don't always mean an immediate sale, or a sale at all, but if you're not getting sales, it's very tempting to stop it.