The answer is "cash cows".
Cash cow is one of the four classifications (quadrants) in the BCG framework that speaks to an item, product offering, or organization with a huge piece of the pie inside a develop industry.
Cash cows, as leaders in a mature market, show an arrival on resources that is more prominent than the market development rate, and consequently create more money than they devour. Such specialty units ought to be "milked", extricating the benefits and contributing as little cash as could reasonably be expected.