I've been using Zinio for months now & you can find free coupons on the internet.
Zinio also gives daily deals for members & special gifts for subscribers.
I've subscribed 2 Magazines & got 5 free subscriptions (searched on google).
For online articles, there are many Free online article apps for Android.
Feedly, AOL, Y!News, Google Play Newsstand & Flipboard are a few apps I use to read online Articles (there are many more)