I can start a company tomorrow selling farm churned butter from the cows that operate at my farm. It is the best butter because every morning I go to the cows and tell them they are the best cows this side of the Mississippi. I churn the butter by hand and sell out a lot of product. However, when I max out the cows on my location, I need to buy more cows for my farm and increase the amount of land or I can ask Farmer Jed next door to talk to his cows in the morning and tell them that his cows are the best cows this side of the Mississippi. Farmer Jed churns the butter by hand, but he forgets to wash his hands after he goes to the bathroom, something I never did like about him, but he tells this great story about him and the milk maid over in Aberdeen.
Multiply my success more and more and finally I am needing thousands of gallons of milk, a centralized processing system to churn the butter and ensure quality control of my brand and then I have a knock on my door from a white glove butter churner. They have gone through the regulatory process with the FDA, have done butter churning for other companies successfully, and have a great track record. I will hand over that portion to them.
This is why the companies start out warm and fuzzy, but regulatory issues, meeting demand, and other fun things cause a drive to outsourced production.
I don't think it is easy for everyone to take the recipe and replicate it.
I also don't think you can easily use the recipe with homebrewing equipment and obtaing the same output, maybe it could be done with professional scale equipment but I am not sure.
To me is a nice marketing stunt aimed at the homebrew community.
Also note that they're open-sourcing the recipes, they're not allowing anyone to reuse the names of their beers.
One of the obnoxious things I've noticed about capitalism, is that its current incarnation seems to incentivize bait and switch. You develop warm fuzzy feelings about a brand, but then they start to outsource production, or sell their brand to a national brewer. This seems to happen a lot to beer, often with a change of taste and a degradation of product quality. With "open source," at least the customer can homebrew their own and do an AB test.
(Same sort of thing happens with startups, I've also noticed.)