They pay to scrap them but they get profit for selling the said scrap to the company.

... Maintaining a ship’s hull will be a lot more difficult than a normal structure of a bridge. And they will more or less need to be sunk in shallow waters or else they may risk drifting or rocking back and forth making the bridge rather wobbly.

“Tank battles are obsolete anyway: once air-superiority has been established its about the drones and the Apache Gunships, which no tanks in the world are going to be able to deal with.”