In.App Subscriptions

Question

Certain app store products may include functionality that enables you to acquire content on a subscription basis (" In - App Subscriptions "). In-App subscriptions will automatically renew for the application time period you have selected and, were applicable, your account will be charged no more than 24 - Hours prior to the expiration of the current in-app subscription. you may cancel automatic renewal of paid in-App subscriptions by selecting the subscription you want to modify. The auto-renew feature of the subscription will be turned off if the publisher increases the price of the subscription.
You may cancel free in-App subscriptions by deleting the App Store product from your device. Certain paid in-App subscriptions may offer a free trial prior to purchase. If you decide to purchase a paid In-App subscription prior to the end of the free trial period, your paid In-App scription will start immediately certain In-app subscriptions may be designated as " NewsStand " products, in which case they will appear only within the NewsStand application on your device after download. You should also review additional information about the Paid In-App subscription offer at the point of sale within the App Store Product.
We may ask for your permission to provide the Name, Email Address and Postcode listed in your account to the publisher so the publisher can send you marketing messages about it's own products in accordance with it's privacy policy. Once the publisher has this information, it will be treated in accordance with the publishers publicly posted privacy policy.
We encourage you to learn about the privacy practices of the publisher before agreeing to give it your personal information. For more information, please review the publishers privacy policy or contact the publisher directly. Refunds ( Which will be Pro-Rated to take into account content included in the In-App subscription that you have already received ) are available within 14 calendar days of purchase of the In-App subscription by completing the E-Mail form available at http://apple.com/uk/support/iTunes/  No other refunds, returns or cancellations after purchase.
Now my question how does this apply to the Free In-App purchases is someone has already downloaded an App!
Users are now required to accept the following Apple terms if they Want to download and install any updates to free content.
Regards
Vividi

Answer 1

Not only can you, but Apple highly encourages it - that's how they get their 30% cut!