Via and email, subject line "Retiring Google Affiliate Network services."
Dear Publisher,
As you may have read in our recent email, we've made the difficult decision to retire Google Affiliate Network (GAN). According to your GAN Online Program Terms and Conditions and AdSense Terms and Conditions, we will suspend all GAN services, except for certain reporting and payments functionality, on July 31, 2013. On October 31, 2013, we will suspend and terminate any remaining GAN services.
Publisher payments will be disbursed for your GAN network activity generated through July 31, 2013. For clarity, the last day that new activity will be tracked through GAN (including conversions) is July 31, 2013.
Affiliate publishers can continue to earn AdSense revenue through the AdSense network. Thanks for your support of our affiliate product, and we look forward to helping you grow your business in the future.
Sincerely,
The Google Affiliate Network Team
I truly can't blame them for ending it, after trying it for a short amount of time, I wasn't a fan.