I think I understand what you are doing, I guess I am saying that perhaps, if the idea is not getting the kind of income you need, that maybe you are targeting the wrong market. Perhaps it would help to change your
perspective. If you have been doing this since 2007 and it is not working out for you, then there may not be a large enough market. Can you expand the market by examining who else could use your service?
I did not mean to criticize the idea, because it is a good one, but just wanted to suggest you look in a different direction for customers. Maybe your customer is not just the shopper, but also the grocery store, who would pay you to link to your website, or the affiliates with coupons to distribute. What about an e-book with your "best of" tips?
I did not attend a couponing seminar, but I do know of a lot of grocery stores that are offering these in house, at no cost, to their customers. Maybe they would offer your video on their websites for those customers who could not attend in-store seminars and pay you for this service.
I owned a retail store for five years and sold for 5X what I paid, so I have some experience in business and particularly in marketing. Good luck with your idea.