You pointed out a huge problem to find the right people with highly specific needs. That's why we are working on an identification tool that automatically returns people according to their intent (stated interest, complains "e.g. if I only could..."). The grand idea is to turn around the annoying sales funnel who many preach is just the right thing to do. However, such a funnel produces a lot of waste, first the seller's money, second the prospects time and nerves.
http://sircular.rocks/zocialgraph.pdf
