when the tech first came out it would have been really easy, but now it is unpatentable due to the One Year On Sale Doctrine which states: if an item/tech/idea has been on the market for over a year it is in the public domain and unpatentable.
also.... all businesses are designed to make money. if whoever invented it first thought that they could make more money off patenting it and licensing it and they didnt, theyre an idiot.