The residential market is the largest source of revenue, but business sections are more profitable. Market segmentation is a successful strategy. Despite strong competition there is still room for small players. The problems they are facing, are similar to those of others and suppose cooperation in the area where they should act. So it does provide them with information.
Traditional Internet provides best effort services.
This is going to change. Remaining problems for the integrated service networks include variety of service, number of technologies, emerging integrated services, securing electronic payments. Charging and accounting mechanisms based on economic models are an excellent source for policy making. Today's transition from phase 2 to 3 is driven by new technology development. The survival of an ISP depends on it getting a minimum number of users.