Are the other ladies finding this useful?

This site, like any other site, can be useful depending on what you make of it.  It's a great way to make yourself known.  

There is a Photo only board where women can post a photo of themselves each day.  There are regional ad boards where ladies can post a weekly ad.  If you tour, you can also post ads on the cities you plan on touring to let the community know you will be visiting.

Then there is a regional board where potential clients/providers interact and some will post a "Is seeking out (ISO)" if they are looking to meet a lady. Also a great way to meet other providers in your area and network with them.  There is also a national ISO board where the same thing occurs.

So yes, there are a lot of benefits to using this site, depending on the amount of time you're willing to invest here.