Not only is it possible, it is very common and they've been doing it for at least 10 years. Sometimes its obvious, sometimes its not.
A common tactic will be selling a cheap USB cable for well below the market rate (because a cheap-to-make USB cable tends to perform identically to a more expensive one) and then swapping the product out for something similar but more expensive like a USB hub. If you go and read the reviews, you might have to read very carefully to see the difference between a USB cable and a USB hub.
Another tactic that sellers exploit is having one listing for multiple products but specifying each product as a different "color". So one "color" of the product is an SD micro-to-full adapter, another "color" is a USB SD card reader, and another "color" is an SD card, and so on. The key here is that the reviews are linked to the listing and not the separate products. So most of that 4.5 star rating could apply to only the adapter while the SD card might be garbage.
A common tactic will be selling a cheap USB cable for well below the market rate (because a cheap-to-make USB cable tends to perform identically to a more expensive one) and then swapping the product out for something similar but more expensive like a USB hub. If you go and read the reviews, you might have to read very carefully to see the difference between a USB cable and a USB hub.
Another tactic that sellers exploit is having one listing for multiple products but specifying each product as a different "color". So one "color" of the product is an SD micro-to-full adapter, another "color" is a USB SD card reader, and another "color" is an SD card, and so on. The key here is that the reviews are linked to the listing and not the separate products. So most of that 4.5 star rating could apply to only the adapter while the SD card might be garbage.