My $0.02 worth...
Some evidence that the posters pictures are of the poster.
Not a big deal on Lyla, but on Backpage posting fake pictures is rampant
Unless the poster has at least one picture of themselves holding a piece of paper with their hand written phone number, I don't even consider it (yes I know this can be faked too, but it requires more effort too do so).
Clear, in focus high resolution pictures. Unrecognizably dark or blurry photos provide no benefit and extreme close ups of body parts (boobs / ass) provides no context
With limited text, I guess the basics (name, age, height, etc) and a link to a website or other resource where further details can be found (e.g. booking requirements, rates, restrictions, etc)