There are a lot of women prostituting themselves now a days. Like Kenny Pugh would say (author of Can You Do It Standing Up) "If you are exchanging anything for sex it's prostitution."
Dating has to do with intent. Do you care for this person sitting across from you or are you sitting there with someone you don't care about but receiving gifts/dinner/money?
Quid pro quo is running rampant.
If you are exchanging affection for profit=prostitution.
If your conversation begins with a "so you want to date me" then "I need ...." - prostitution
When you are only interested in what someone can do for you -prostitution. When you don't care for that person and if the money/gifts/dinners weren't there you wouldn't be bothered-prostitution