Here in Australia - where prostitution is legal in most states - there are things you can and can't say on a website.
For example if the girl lives in one state her website cannot display images that show anymore than just her head and shoulders.
In another state a girl cannot recommend other girls so linking to friends' sites is probably unwise.
Offering a massage as part of the service is also illegal in some states so even if she does offer it she can't say so.
Offering or even hinting at offering unprotected sex is illegal in some states and actually finding which laws affect you and which ones don't is almost a matter of luck
One state recently amended some important prostitution laws but did not post those amendments on an information website it runs for the industry - meanwhile the police from that state have been quietly checking to see if girls in that state are breaking the new law and the ones that are breaking it are finding themselves in trouble.