I live in the UK, power link was approved over 2 weeks ago (and order placed the day the free offer went live) and submitted a query asking why the payment details information hadn't been sent out yet. Response below.
EVGA Support Email
Peter Freeman, thank you for contacting the EVGA Customer Service Team. My name is Kevin Song and I will answer your question today.
Your Answer:
Hello,
I apologize for the inconvenience, for the power link promotions. At the moment why you did not get the payment, is because we still wanting for the package with the power links. Once we get that product, you will additional email to submit the payment. After that we will go ahead and send you out the power link. I apologize for the inconvenience, at the moment we have no ETA when will start processing those promotions.
Regards,
EVGA
So it looks like its just a waiting game if you're from UK/Europe.