Here is a list of the best GPT sites out there, that will help you earn more than $5.00/day
Ubiz:

-Low $2.00 Payout (Paypal verified only)
-Lots of 1c,1.5,3c emails (SEARCH Emails)
-Australia,Canada,UK and US.
-Referral Leves 8%-3%
Our Rating: 9/10
Cosplaymails.com:
Brand-new PTR site, super fast earner

Features:
-1c emails/+50 mails daily!(SEARCH Emails)
-Easy to reach, $3.00 payout!
-Only users from US, CA, UK
-3 Referral levels: 8%-3%-1%
-Payouts through E-gold and Paypal!
Our rating: 9.9/10
DonkeyMails.com:
Get paid for reading emails and promoting this site.

Features:
-No mininum E-gold Payout!
-0.25c to 1c emails /+50 emails daily!
-Payouts made weekly!
-Payouts through E-gold, Paypal, AlertPay.
-Get Paid To Promote $0.75 per 1,000 Credits!
Our rating: 9.5/10
TreasureTroopers.com:
Get paid for completing offers!

Features:
-Complete dozens of offers online and start making money!
-$20.00 minimum payout, easy to reach!
-Find the hidden treasure and earn extra cash!
-Payouts made on the 15-20th of each month!
-Make money off your referrals!
Our rating 9/10
Mybizs:
Really good PTR site

Features:
-$2.00 payout!
-Daily/Weekly surprise bonus!
-All Solo 1 and 2 Cent Emails!
-Australia,Canada,Uk, USA.
-Payments via Paypal(verified only)
Our rating: 8/10