COZUMEL

Even largest listed companies, such as Meliá, use photos that are anything but presentable.

Here I tried to correct their photo (BEVORE) as best I could (AFTER), trying to bring some more sun and cleaness to the picture. See the difference.

I can not understand that.
Taking good photos from this one camera would cost about 100 euros. This increases the chance that the holidaymaker will be charmed by just a good photo and not by a photo where gray walls and ceiling, skewed perspective or room interior where it must be straight and frontal.
One week sharing of this room would bring about 1000 euro. This way you get ROI of 1000%. Not bad at all.