From time to time I am offered an amazing deal, a free trial or some other valuable benefit in the hope that I will say good things about the product or service. Unless the offer is made to others, either through a marketing group or based on some other relevant criteria, I say no to the offer.
Newsagents have an obligation to each other to declare if they get something for free or through some special treatment which they then go on to endorse, promote or act as a reference site in sales situations.
Too often newsagents have been led into products without knowing of a conflict for the person offering an endorsement.