Discusses how some companies desperately make a profit by `cream skimming' from their competitor's most profitable products. How the term `cream skimming' was first used in 1970s in a pejorative way by AT&T Company to describe the market entry of MCI; How cream skimming has come to mean a smart competitive strategy epitomized by a company in any industry that appropriates the high-profit business of another; Several cream skimmers in various industries. INSET: Briefcase..