Open Source is not a business model. It's marketing, for sure, but you can't make money solely by giving away your product.
Every single open source company eventually learns this when they have a strong competitor. Eventually you are forced to stop being open source, because no business wants to compete solely on the strength of their service quality.
Moreover: a community is antithetical to a corporation's interest in the software. Corporations don't give a shit what people want changed in the code, for good reason: their purpose is to make money, not make good software. So business source always ends up annoying and limited while community open source provides the functions the users need, in the way they want them.
So, yeah, you can make money while letting people read your source code. But the actual quality of the end result, the user's happiness, the ability to contribute to the whole thing, is much different in a real community project.
Every single open source company eventually learns this when they have a strong competitor. Eventually you are forced to stop being open source, because no business wants to compete solely on the strength of their service quality.
Moreover: a community is antithetical to a corporation's interest in the software. Corporations don't give a shit what people want changed in the code, for good reason: their purpose is to make money, not make good software. So business source always ends up annoying and limited while community open source provides the functions the users need, in the way they want them.
So, yeah, you can make money while letting people read your source code. But the actual quality of the end result, the user's happiness, the ability to contribute to the whole thing, is much different in a real community project.