Hey guys! I'm cofounder of Scale API (www.scaleapi.com), a YC S16 company building an API for human intelligence. We've been working to obviate the need to tune your system to work on products like MTurk, and instead have a really simple API that just works. We've worked to build technology to guarantee quality to our customers and build a simple developer experience.
I really respect your ability to work with MTurk and have it work for you guys. In our experience, it often takes significant effort to get anything remotely functional and reliable on MTurk. That's why we're building Scale :)