For $6 an hour, how is this profitable? How easy can it be to find intelligent, English-fluent people with bachelor's degrees, anywhere in the world, who are willing to work for the fraction of that sum which is left after overhead costs and profit margin are taken out?
From what I've heard, a VA starts at around $250 per month for dedicated service if you source them yourself. If they're really good, you can retain them for $400 per month. $400 per month is $100 per week which is $2.50 per hour. They can make a profit in that space.
My guess is that there is some amount of quota that goes unused. You pay for 40 hours, you end up using 30. That probably helps a little, but still... how is this profitable? I'm with you.