I'm glad this is getting more attention! I posted the original reporting from The Australian yesterday - it's a good primer. https://news.ycombinator.com/item?id=47379740 https://archive.is/pvRaG
Medicine is the classic example, but it's happening in the tech industry too. The FAANGs of the world took advantage of an unregulated landscape, but now that they're in the castle they're pulling up the drawbridge behind them.
(sidenote - this is why regulation like the Digital Markets Act in the EU should be great. It's only a cost to larger businesses. In practice we're not yet seeing the changes that it should create).