One of many things to put you off. No face pics, no nudity, strange angles, partial shots, bunny ears or doe eye filters, either trying to maintain their anonymity, from the SP's point of view, or more likely trying to disguise the fact that they're fat, ugly, 30 years older than the profile suggests.
Having said that I've just booked a fantastic SP for the second time who has no face or nude pics in her AW profile but came well reviewed and highly recommended by one of my local UKP compatriots, because of all the photographic subterfuge good reviews are far more useful.