It's kind of a hard thing to directly monotize. Most of the people who ultimately make money from the work done by Mturk workers are people like app developers. Like the business card guy... he runs a website/app where people pay him to digitalize all of their business contacts. They pay him a fairly substantial fee, take pictures of all the business cards people give him. He then posts the business cards on Mturk. People transcribe the cards, he sells the work back to the client.
There are a lot of problems with making the whole thing profitable.
1: Figuring out how to turn the work you need done in to microlabor. You have to break everything down in to bite size chunks, and you have to make sure the task is easy for workers to understand.
2 : Quality. Insuring workers provide good quality work is a huge pain. If you reject people for bad quality, they bitch and moan and hamper work flow. If you don't reject bad quality, you're left paying for shit work that you can't turn around and sell. Qualifications help, but you have to spend the time to monitor the qualifications and set up a decent work force that's both skilled enough to do the work correctly and big enough to do the work well.
3 : Turn around time. You have to get results fast.
4: Finding the appropriate wage. Too low, no one does the work. Too high, you don't make any money.
Honestly, I don't think it's the kind of thing you can do quickly, and the amount of time and effort might not even be worth it.
