How many of those people are actually going to be responsive? How many of the questions people ask are going to be ones that you can answer? Seems like a lot of effort, for a low return...
I mean here's the funnel as I see it: A. People who ask questions somewhat relevant to best buy products. B. People who see the answer. C. People who then remember best buy in a positive light. D. People who then decide to visit a best buy E. People who then actually buy something at best buy on their visit.
It is very hard to track B-E, and E could happen 6 months to a year later.
I'm not sure how you make money by selling people a tool to let them maybe get a fraction of a percentage of people to buy something from you within the next 24 months.
But, usually when I'm this confused, it means I'm missing something extremely obvious.