Markets
The point about markets is that they contain suppliers AND buyers. We sometimes forget about the buyers! And of course any analysis of markets has to consider the structure, conduct and performance of the market. Structure refers to the concentration of the players. If the top four suppliers have a combined market share >80% that is a tight oligopoly. The point is that their bargaining power will be greater than smaller suppliers, and probably most buyers. Buyers can also have varying levels of concentration. There can be other sources of bargaining power, but structure is the most common source.
RFPs and other market enquiries initiated by buyers are called interactions. They don't change the market structure, conduct or performance. This is perfectly OK in many markets. But if the market is claiming value from the buyers, a market intervention may be required. Sponsoring a new entrant, changing the conduct of a supplier or transforming the economics of the market are all market interventions.
Other videos that address markets include War Story #2