i need a good affiliate network that allows a wide range of incentive offers for a gpt site...

Adscend Media, Revenue Universe and ******* are the main incentive networks. You can also try Maxbounty, it has an entire separate section of their network dedicated to ONLY incentive offers. Many CPA networks offer these types of offers but they are very sparse. Maxbounty has them. You may need to sign-up for that side of the network separately.