A year after Thumbtack raised $100 million to expand its marketplace for home services and other professional freelance jobs, the startup is making its first acquisition to beef up its engineering and product teams. It has acqui-hired talent from HeartThis, an app with 2 million users that lets consumers shop across multiples stores from a single portal. You might think that this is a sign of e-commerce consolidation, but HeartThis and Thumbtack sit at opposite ends of the marketplace spectrum, respectively covering products and services, and at least in this case never the twain shall meet. Thumbtack is not acquiring HeartThis’s product or technology. It will instead take on four people, including co-founder and CEO Andrew Gadson, to work on different projects, likely first starting with mobile services.