That's basically WAI though. Plastic bags were banned because of the environmental impact. For some particularly naive customers they might think it's a feel-good initiative from a brand they now love a little more, but at the policy level it's really not important how various implementers want to spin it. What's important is that the outcome is a reduction in plastic bag use.
Oh, I'm not saying any of these are bad. I'm just saying you shouldn't thank Google (or the supermarkets) when they try to spin this as charity. Some people might not want to hear this, but the thing doing this is not corporate volition but regulations.
