I don't think you understand the Linux vendor support model.
The labor isn't "donated" in any sense of the word. It's not like these big companies just pay hundreds of kernel developers to sit around and make commits to whatever they're in the mood to do today.
Clients pay Linux vendors to get the hardware support, features, etc. that they need written into the Linux kernel, and the vendors do that for them. They write the code, test it, harden it, and get it upstreamed so that the client isn't stuck carrying a patched kernel on their own in perpetuity.
It's not the financial interest of Linux consumers (think: banks, airlines, healthcare systems, militaries, cloud platforms, entertainment producers, etc.) to pay millions of dollars a year to have their own in-house kernel development and support team when they can pay a vendor to do it.
It's not just about support in the sense of someone to pick up the phone, it's about support in the sense of maintaining and developing mission-critical software for large enterprises.
And with that, indemnity.
Do your shareholders want to hear that you're working with a tried, tested, trusted vendor to make sure your systems that can never, ever, ever go down are in fact designed that way? Or do they want to hear, don't worry, Dave in IT's got it, he got a kernel patch accepted once? In many industries, IT is just a cost center and a risk. Corporations and governments are motivated to lower their IT-related risk in the most financially-prudent manner, which usually means a vendor.
The labor isn't "donated" in any sense of the word. It's not like these big companies just pay hundreds of kernel developers to sit around and make commits to whatever they're in the mood to do today.
Clients pay Linux vendors to get the hardware support, features, etc. that they need written into the Linux kernel, and the vendors do that for them. They write the code, test it, harden it, and get it upstreamed so that the client isn't stuck carrying a patched kernel on their own in perpetuity.
It's not the financial interest of Linux consumers (think: banks, airlines, healthcare systems, militaries, cloud platforms, entertainment producers, etc.) to pay millions of dollars a year to have their own in-house kernel development and support team when they can pay a vendor to do it.
It's not just about support in the sense of someone to pick up the phone, it's about support in the sense of maintaining and developing mission-critical software for large enterprises.
And with that, indemnity.
Do your shareholders want to hear that you're working with a tried, tested, trusted vendor to make sure your systems that can never, ever, ever go down are in fact designed that way? Or do they want to hear, don't worry, Dave in IT's got it, he got a kernel patch accepted once? In many industries, IT is just a cost center and a risk. Corporations and governments are motivated to lower their IT-related risk in the most financially-prudent manner, which usually means a vendor.