I had basically a similar item I purchased for my 2011 Golf TDI (may even still be somewhere in my garage). I found it to be very useful. I will have to look into this for my CX-5 GTR.
I see the same thing if I google that part number the OP included. I also printed the installation instructions on Mazdaswag website. The OP picture is what's included in the installation instructions & has a zippered cover. Other Mazda websites show the above red picture which is actually of a similar shelf for a Mazda3 I believe but listed under part 0000-8B-R25. So OP picture looks to be the correct one for that part number.
As I mentioned above, it appears the pictures for the shelf are incorrect on all the parts sites other than Mazdaswag, which is what the OP included. Mazdaswag also has a pdf of the installation instructions which gives better info on installing & removing the shelf.Looks interesting. From the picture on bamwholesale it looks like the cargo cover still can be used. Let's hope that is the case. Wonder how deep it is, didn't see any measurements.
There always a more value option approach.BamWholesaleparts.com has somewhat lower price . . .
For over $200, I'll pass.