I visited the site and I've found that their minimum payout is just $5 and not $20. Right now they have referral contest too.
1st Prize (top referrer) $3.00 to your Paypal
2nd Prize (2nd top referrer) $1.00 to your Paypal
3rd Prize (3rd top referrer) Paid Email to all worth 1/2c @ BlueSkyEmails

But I'm not able to find how to earn money from there. I mean I don't know whether it is paid to read email, or paid to click, or paid to signup. They haven't mentioned these stuffs in their home page.