But is there any indication whatsoever that these measures have any tangible effect or are they just for show? Virtually all of the spread is thought to be from respiratory droplets and almost none through contact so all the sanitizing may be wasted effort. Provided you keep your fingers out of your mouth. The floor mats in particular seem disgusting. When I was there a few weeks in Sept I didn't see them changed out once. They looked more like breeding pools for germs not sanitizing pads. The adjacent towels were dark grey where they were once white. Not that I typically lick my shoes but I see these as counterproductive and more likely to be a source of contamination than a sanitizing.
Temp screening sounds great in theory but the execution not so much. I've worked with half dozen scanners and temped hundreds of people and they all read different and tend to read low. Any sweat will cause a real low reading. And if a place wants to "look" like they are being safe but not actually lose customers it is easy to calibrate them down. And there are plenty of things other than covid that can cause "fever". Such as sunburn.