Mechanical Turk doesn't have built-in quality assurance so unless you're very skilled in QA systems or have a lot of money to burn on validation it's going to

Mechanical Turk doesn't have built-in quality assurance so unless you're very skilled in QA systems or have a lot of money to burn on validation it's going to give poor results. Btw it's relatively hard to build a QA system that validates work, establishes trusted workers and optimizes for cost without significant redundancy. I do the technology at an MTurk competitor that automates the quality assurance/training process and pays fair wages to refugees to do the work (workaround.online) if anyone is interested in an alternative to MTurk that is still relatively cheap I would highly recommend it.