Paying a pro photographer to come take a few shots of the place pays off immensely in the number of bookings. It's just good marketing.
As a photographer, however, I can attest that there is a market for people looking to pay to have a better Facebook/LinkedIn/Dating-Site profile photo.
"Internet Disease means displaying old, faded, blurred or otherwise non-descript photographs of oneself, taken with bad lighting and at awkward angles" - in order to hide obesity and acne. I'd give a link to the encyclopedia dramatica definition of it if it were not for the popups on that page.