Amazon - Free promotional certificate up to $15 w/select magazine subscriptions

Keep up to date on world events, finances, or even the latest fashions by broadening your horizons with a few new magazine subscriptions from Amazon. Select magazines now bring a free promotional certificate valued at either $5, $10 or even $15 with them. Choose from popular magazines like InStyle, Sports Illustrated, and Entertainment Weekly. And the great thing about this offer is that the more magazines you buy, the more certificates you'll receive. Offer ending unknown.