I'm a bit like Sourgrapes - lots of enquiries, but they're usually from timewasters or the type of client I don't see. Oh, and the cretinous Brummie who has phoned me twice within the last week and asked me to stay on the phone while he "finishes off"...
I've gone on Vivastreet with a 30-day free trial, but am not impressed - only one firm booking from it, and it's frustrating not being able to be very descriptive in your profile or list prices etc. (I tried, but they kept refusing it.) I don't intend to keep paying for it.
I pay to display my number on AW as and when I have the credits, but haven't found 'Available today' made any difference, though that's possibly as I'm a niche taste.