We've been thinking of creating posters advertising our boating guides. These would be placed in marina bookstores and shops that our customers are likely to visit.
Each poster would also display a unique discount code. Whenever the code was used to buy one of our guides the buyer would receive a discount and the retailer to whom that code was assigned would receive a share of the sale price.
I'm wondering if anyone else has tried this and how it worked for them. I'd be most grateful for your time and trouble.