Fogg - Small companies that can't afford their own promotional staff give free traded shares, restricted shares or sometimes cash to stock promotion companies to promote their company. In return, those firms then work with brokers, newsletters, email and phone spam to build up interest.
The company itself is then free to concentrate on their R&D, patents, contracts. etc.. - at least in theory. GBRC currently has a contract with Quality Stocks - go to links below and check their "disclaimer" to find their compensation. KP