Earlier quoted context omitted.
I think most people do not understand that Google funnels a lot of their profits to make Chrome and Android into OSS. Youtube may be the only viable company that can come out of Google. Rest will either have to charge a lot of money or die. And we will be left with an even more profitable ad giant, that sends back all profits to it's share holders.
How much effort do Chrome and Android require from a company the size of Google? It's a genuine question. Jolla/Sailfish make a mobile operating system with a handful of people, and even though that system pretty minimal, I'd say the added value on the Android side is the ecosystem of apps and porting to devices, which is done by other developers and manufacturers than Google. And I'm not sure how many people work on…
My biggest question is how long they can stay at a handful if they become popular. The increased burden of security patches alone would likely turn that handful into a small army.
Security through obscurity is often mocked (for good reason), but it actually does work in cases like this as long as you don't reach Android's scale.