Sure I could spend £10 and ask a bunch of random people "Do you like cake?", but without more detail such questions will be simplistic.
If the answerers are being paid to respond it's only a matter of time until they get replaced by bots. I'd spend a few hours writing something to scrape an email, SMS, or web-page and just reply "yes, yes, no, no, yes, yes" if I was going to earn money from it.
In short it's a cute idea, a kind of crowd-sourced yahoo-answers, but "Yes/No" feels like too easy a reply. Forcing users to respond "properly" with actual detail doesn't help much either, if you get a question like "Why is the sky blue?". 50% of people will copy&paste from wikipedia, 25% of the people will think "That's too hard, I'll wait for another question", and the remaining 25% will say "God", "It just is", or "The answer doesn't matter, if it weren't blue you'd just ask why is it red".
In short:
* Simple questions are too simple.
* Complex questions will probably go to the wrong people, but they'll reply anyway to earn their money.
* You need to be able to "Judge" answerers on different metrics to stop bots.
* I suspect many answers would benefit from direct conversation between poster and replier; for example you might say "Your answer was interesting, but why did you say XX?" (i.e. Allow answers to be interactively refined.)
If you do something for free, you show you are a nice person. If you do it for $0.05, you show you are poor or a cheapskate.
The OP is asking about answering questions plural as a low paid freelance gig.
Someone who cuts their grandmas lawn isn't saying they want to cut everyone's lawn for $5 each.
In reality you're going to have a difficult time finding people willing to pay for those answers, and that's where you'll succeed or fail. People answering questions will certainly not be earning $90 per hour, but they''ll be lucky to earn 10 cents per week, because I guarantee you'll be short on questions.
There are also countless reward services that pay people for answering questions or surveys, watching videos, signing up for offers, etc. As someone mentioned on Reddit, Google even has one (https://play.google.com/store/apps/details?id=com.google.and...).
Basically a long way to say no
Or human bots, as @ 2 seconds per question, that would be $90 dollars per hour.
at ten questions per minute, thats a decent salary for a lot of folks.