I think you may be confusing things a bit here. The above is not about persuading anyone about the benefits of closed components. It is about persuading anyone about the benefits of Sailfish.

As an OEM, you would not give a flying duck whether it is open or closed. All that would matter to you is, "how many units does it help me to sell?" And please, put your hand on your heart and tell me, why would you as an OEM take the risk with an obscure OS, with a very limited user base, backed by a small company with a proven track record of not delivering or delivering hopelessly late, in preference to a mature and popular OS backed by a multi-billion dollar company?

I know that if I were such an OEM, I would expect Jolla to pay me for taking the risk. I would definitely not pay a dime. Esoteric concepts like open or closed would play no role in my decision.