I think overall the greenies could accept it. Of all people they should know that any new belief they introduce to society is going to be co-opted by consumerism.
But they could look at it like people spreading a religion: You don't expect that Emperor Constantine is going to stop exploiting people and give up all luxury just because he went Christian. That's not what emperors do. But you know that he's making it socially acceptable so that you can get more converts than otherwise, some of whom will be truly virtuous and add to the church.
From my perspective, I do judge people for being consumerist green instead of true green. But I'm open to that criticism too, I could do more. So I don't judge nearly as harshly as I judge people who don't even pay lip service to greenness.