Appen microtasks

Hello!

I recently signed up to do Appen microtasks. I completed the first task where they send you a mobile verification code. Was that free? The SMS, I mean.

How does microtask work and does it pay well? I don't know what else to use on Appen to find a work-from-home job. So far, I don't see anymore tasks posted on there..it was just that one..how do I get more?