Making Google+ succeed at all costs means exactly that. All previous rules are out the window. Google will eventually violate every formerly held principle if it might help Google+.
I agree with His entire post, though Marco clearly has a typo in here: “will eventually” really should be “has already”.
Not only is this opt-out, and therefore bullshit, but I don't see how it actually helps anyone but marketers. I can just picture this meeting: “How do we get the word out about our new app?”
“Why don't we just spam every blogger we can find on Google+, we will make it past span filters. We can't lose!”