I didn't know openjdk was developed by Oracle. I always thought it was a community implementation of java as opposed to Oracle's proprietary implementation.
Back when I was a kid, there were two toy stores near my grandma's house and they had such a competition. And people were always buying and there was sort of a hype between the two, you could either believe in this or that. And then once my mom asked one of them about something and they told us both stores were owned by one person...
And now you can think you are with or against the corporate Java and in the end you are under Oracle no matter what.