In unmanaged marketplaces like Mechanical Turk, some new entrant will always try do the work no matter how low you price it, and they'll usually do it wrong. T

In unmanaged marketplaces like Mechanical Turk, some new entrant will always try do the work no matter how low you price it, and they'll usually do it wrong. This means you end up running it repeatedly to get the right results, engineering safeguards against malicious or underpaid workers, and more. Because MobileWorks is managed and not a marketplace, you pay a fixed price with no engineering cost.