It seemed like a good deal that you pay for leads rather than traditional advertising where much of money used is ignored or glazed over. But it isn't a good deal at all.
They find new ways to "find" you leads and to charge you. However you get so little business from it. The cost per lead starts to add up, especially when so few actually start to follow through. But even that doesn't mean new business or clients.
I've had a number of people mark me as hired but never even communicated with me and of course they never actually hired me. I've had others actually schedule appointments then cancel at the last minute. Like a doctor, alternative healers cannot work off of clients cancelling a scheduled appointment within just a couple of hours.
I'm now convinced Thumbtack hires people to create fake accounts to act as leads just to charge their pros and then never give those pros any actual new business at all.