Does anyone use thumbtack to get leads/clients? If so, is it worth the $ you pay for credits?

At first, I thought that these aren’t real job requests, since I never heard back from anyone. Recently, I have gotten 3 steady clients through Thumbtack. One of my Thumbtack clients refer me to someone else. I had one person say I was hired, but never heard from them. They do give you a credit if the quote is not read with 48 hours. You need to respond quickly to requests since only 5 quotes are accepted.
Many are looking for the cheapest price they can get. It’s a hit or miss.
I offer a free consultation.
I had some clients post reviews and pictures, which I found helps.
I think it is worth a shot, but be patient.