[schnable]

If the code is open sourced, there doesn't need to be a dedicated company behind supporting it. Assuming a compatible license, any party that wants to use can fork it and pay people to maintain it for their own needs without advertising that they "support" the code.

[SoftTalker]

But just because something is open source doesn't mean it's easily maintainable by anyone. It's one thing to install and run it somewhere, but if it needs fixes or customization it quickly becomes necessary to learn and understand the architecture and organization of the code, the data models and structures, etc. and if it was previously the product of a "one man shop" then you're going to have to pay someone to do that learning.