I am located in Manila and it's been months or already a year that I have no offers in gaining rewards (running an app for 3 mins and receive silver rewards) using mobile cortex.
So I created a ticket to support and got this answer:
"We received an update from our Cortex Team regarding your case. Offers are geo dependent and may not always be available. Be sure to check the app regularly for offers. We also have the Tapjoy Offerwall. Do check there often for more ways to earn Razer Silver!"
Who else are experiencing this? This does not include the Tapjoy thing.