$100 free AWS credits (instant)

1. Go to https://aws.amazon.com/big-data/powerof60/, complete the short form to the right. Only the email really needs to be accurate.
2. You should get an automated email within ~5 minutes with a coupon which you can redeem at https://aws.amazon.com/awscredits/.
3. The credits should be applied, and expire in 11-12 months (check the date).

Only one coupon can be applied per account, though.