Thank you! They did the same crap here where they stopped giving away plastic bags and started charging for paper bags which were always free before. Then they put plastic bags in the stores which are like 20x thicker than the previous plastic ones and use way more plastic, and they charge for those now. They're like "problem solved!". But nobody actually re-uses those. They just buy new ones every trip. So the outcome is that they stopped giving away thin plastic bags and started selling thick plastic bags, and they think it's a win. It's not a win for anything except the grocery store pocketbook. That study is completely pointless like you said. Of course there's a massive drop of the single use bags if they completely stopped offering the single use bags. But if it's anything like over here, they're actually producing more waste now, and costing the consumers money to do so.

Edited for a bunch of phone typos