I think it's an uphill battle trying to date ML's and WL's because for a start you are coming to them from a lower position.

A girl wants a guy that can attract other girls and not just pay for them. A guy that goes to massage parlours or brothels regularly is just looked down upon even subconsciously.

You don't have to tell them but in their mind they would think that this guy doesn't have a girlfriend or much going on in his social life no matter what your appearance is like or what you've told them.

Having her remember you or say she was thinking about you is a good sign but that's all it is and it won't get you far.

The key to attracting any girl is emotional impact, the more you can impact her emotions positively the better it is but it doesn't always have to be positive. Girls want to feel the full range of emotion from a potential lover or so I've been told...

You need to get them investing in you basically (aka flipping the script having her chasing you). I know it sounds strange but think about yourself what makes you care or invest in people? Has a stranger (could even be a girl) just walked up to you on the street and you've blown them off and kept walking?

For most guys just seeing a hot girl is enough to become invested. But for girls it's different, in the romantic sense nice guys finish last every time because in this context nice is synonymous with boring. You need to challenge them somehow.

I definitely wouldn't mind dating WL/ML but at the end of the day they are just girls nothing special. Only just they happen to work in the sex industry of which sex is the end game for nearly every guy that was thinking about an attractive woman ever.

Having said that as you've probaly already guessed it's most likely easier to get an ML to date you over a WL. So fine choice..