According to Forbes, the St. Louis Rams, in September 2015 had a value of 1.45 billion dollars. When Kroenke completed purchase of the team in 2010 the estimated value was 750 million. So the value doubled in five years.
Prior to the teams departure, the Missouri task force put together as a means of keeping the Rams in St. Louis unveiled plans to build a 985 million dollar riverfront stadium for the team. Public money would have comprised a couple hundred million dollars of that total.
To suggest that the Rams weren't making money is not accurate. Were they maximizing revenue compared to a move to L.A.? Of course not, but they were highly profitable.
Stan Kroenke is worth an estimated 8 billion dollars. He is a business man, I get that, and the Rams are an asset. He has the right to maximize his asset. But there was a time when many owners of sports teams saw themselves as stewards of a community asset as well as owners of a product. In fact, this used to be how a lot of business owners felt. No longer.