Selling online is a daily job, there is really NO place that you can just "list and forget" without putting in daily work which includes tweeting and blogging and facebooking and getting your BACKLINKS out there on the web to be spidered by search engines so that people searching for what you have to sell can FIND you. It's just how it works. I have also noticed that literally EVERY time I "update my Bonanzle Booth", even if I have not changed a darn thing, I get a sale, so I try to remember to do that at least weekly. It refreshes the feed and makes everything look "new" on the web.
Everybody and his brother, sister, aunt, cousin and childhood sweetheart is out there on the web competing with you, many selling the exact same or similar items. You have to do the work to make YOUR listings stand out in this crowd.
Bottom line is you get out of it what you put into it, doesn't matter whether you list here or Etsy or whatever, the VENUE isn't the problem. It's like those three laws of thermodynamics (you can transfer energy but you cannot just create it from nothing), or as Robert Heinlein stated "There ain't no such thing as a free lunch" often referred to as TANSTAAFL.