OK, I'm not saying this a bad thing to do. I'm wondering where's the ROI for a for-profit corporation in "buying credits to say they subsidized renewable energ

OK, I'm not saying this a bad thing to do. I'm wondering where's the ROI for a for-profit corporation in "buying credits to say they subsidized renewable energy somewhere" other than, say, Marketing? When one sets out to write checks to charities the Hoover Dam isn't exactly the first to come to mind.