I'm a big fan of what you guys have built at Thumbtack. In fact, prior to BuildZoom, I remember looking at Thumbtack and really digging the interface & design. Its a great company with great leadership, heading in the right direction.

I do question the premise of the services market as whole being a "winner-take-all" space. I do believe this becomes more viable in a more narrowly defined segment of the overall local services market.

I think the marketplace examples of a "winner-take-all" (e.g. eBay and Amazon) are a bit questionable (it isn't the first time I've heard this perspective).

When I want to buy something used (for example), I have probably turned to Craigslist just as many times as I've turned to eBay. When it comes to new items, I always look at Amazon but the overall query covers a much broader space, which will include more specialized e-commerce sites.