I started using Mailshark in January 2016 and at that point my store had reached $30,000 in sales only a couple times in the 19 years I had owned it. since that time there has been only one time that I have not hit $30,000 and now I am hitting $40,000 at times and am always over $35,000. If anything we have cut back on our other marketing a bit and are still growing considerably. I’d have a hard time saying that Mailshark isn’t a big part of the increase in my sales. You could save a little money and do the work yourself to mail EDDM but when I tried to do that I rarely got the pieces I planned to mail to the post office as consistently as I had planned.
As to Pizza Pirates post above, I found the Mailshark folded magnet piece to be one of my worst returns. I now alternate between tri fold menus and postcards. If you want a great return, do their scratch off or peel a deal and make all cards a winner with a side item or small pizza.