Margarine(.)net Margarine, as a generic term, can indicate any of a wide range of butter substitutes. In many parts of the world, margarine has become the best-selling table spread. It is an ingredient in the preparation of countless foods. In some regions people even refer to margarine as butter in informal speech. Almost 6,000,000 results over at Google.com for the word alone. There is no shortage of end users as there are so many companies that make and market the product. Great potential, especially as both .com and .org are developed. Taking offers from $250.