These jobs often involve local knowledge and range from things like checking what street signs say in rural Sudan for a satellite-navigation service to translating words into a Kenyan dialect for companies trying to spread their marketing.
For those who really want to keep track of their socks, the app also produces a range of data - checking how black they are, offering to replace worn-out socks and even finding a close match for socks whose partners have gone astray.
Bank of America currently charges a wide range of monthly fees for checking accounts, unless customers meet certain requirements, but the new plans being tested could change the amounts being charged and the triggers for fees.