here are some update from forum admin added GPT in Paid to post section but their is limitation of 3 threads and 7 post in one day check update here :

http://noexpiry.com/showthread.php?tid=74

For GPT Sections you are only allow to post 3 threads (within the 10 daily thread limit) and 7 post per day. Anyone post more than that in GPT section will get a deduction of $2 credits as penalties