Dont waste your time with thumbtack if you want to advertise. Save yourself the time making a profile.
They charge you over $1.5 per a response when they expect only 1 in 5 to be legitimate reply. Thats an average $7 per a customer. From my experience its more like 1 in 12 are legitimate paying customers, thats about $15 per a customer. Google advertising or a newspaper is far cheaper and gets more views.
Plus you put in less time to get far better results than thumbtack.
Also not that many people use thumbtack to find your business. thumbtaack is bad