Does anyone knows of micro jobs portal where I can hire number of people for micro jobs of $1 of less?
$1.00 or less? After payment fees, you're basically asking where you can find free labor. What are you expecting for a buck?
I know this is old but if you want forum posting services, there are a few sites that do that specifically paidforumposting.com https://contentgather.com/ Just search google. I have actually used these to make some extra cash. Slave labor after a while, but lots of people do it! edit- I see the banhammer