ocr: Profits? What Profits? Don'tlook to be making too much money from the Internet anytime soon.According to Content Profit Models, a new re- port from Forrester Research, it won't be until the year 2000 that 20 percent of the U.S. adult population goes on- line and revenues exceed costs. That's the critical mass need- ed for sites to become self-sufficient through advertising. Revenue 3 - Costs a 2 la X 1996 1997 1998 1999 2000 Source: Forrester Research/Photo: Photodisc