You have no idea what you are talking about. You sound like a stockbroker trying to short a stock. We have a Pinterest account with 3 million monthly viewers and do 90% of our sales through Pinterest, and you are telling me to just forget about it. How about not trolling this forum post, just because you don't like Pinterest doesn't mean nobody else should have the option to use it. If you don't have something constructive to say just don't say anything... any real marketer will tell you not to miss any opportunity for more sales.
For anyone looking for ideas on what to do without the sales channel, try Tailwind to help automate/reuse your posts, check out PinPinterest for additional functions like follow/unfollow, these are both off-page solutions but they can be really effective, see pinterest.com/CostumeIdeas11 for an example of how far that can take you.