Hey there @Yoseco and welcome to Thumbtack! What you're paying for is the initial contact you receive from a customer. That can be the first time a customer messages you, requests a call or estimate, or asks for your availability. Check out this article here for more info on what you're paying for.
I understand how it can be frustrating when you hear from a customer initially and then you don't hear from them again. Make sure you're sending follow up messages reminding the customer that you're still available to help with their project. A little nudge can really go a long way!
I'm here to help you with whatever you need and I truly want to see your business thrive while using Thumbtack. If you ever want me to look over your account and give you some tips, I'm more than happy to do so! Just send me a private message and I'll get looking.