Ditto the above re. timewasters, including phone wankers - literally. My profile is brief, but still got calls from men I state in capital letters that I do not see...
I've had a couple of decent texts/emails asking for more info, so I can send them my website URL, but more inane phonecalls of the 'tell me about yourself' type.
The one booking I did get from it - I asked why he used Vivastreet. He said he had an adult content blocker on his phone as his son often used it, so no Adultwork, but Vivastreet is OK.
Very much doubt I'll pay them for an ad going forward.