Google went through the Google Play Store today and started to remove several ad-blocking apps. Major ad-blocking apps like AdAway, Adblock Plus, Adfree, Adblocker have received letters saying that their apps were violating section 4.4 of the Play Store Developer Distribution Agreement, and that they would be removed from the Play Store.
4.4 Prohibited Actions. You agree that you will not engage in any activity with the Market, including the development or distribution of Products, that interferes with, disrupts, damages, or accesses in an unauthorized manner the devices, servers, networks, or other properties or services of any third party including, but not limited to, Android users, Google or any mobile network operator. You may not use customer information obtained from the Market to sell or distribute Products outside of the Market.
Here is an email Google sent to Ad Blocker:
This is a notification that your application, Ad Blocker ★ Root ★, with package ID com.jrummy.apps.ad.blocker, has been removed from the Google Play Store.
REASON FOR REMOVAL: Violation of section 4.4 of the Developer Distribution Agreement.
After a regular review we have determined that your app interferes with or accesses another service or product in an unauthorized manner. This violates the provision of your agreement with Google referred to above.
All violations are tracked. Serious or repeated violations of any nature will result in the termination of your developer account, and investigation and possible termination of related Google accounts. If your account is terminated, payments will cease and Google may recover the proceeds of any past sales and/or the cost of any associated fees (such as chargebacks and transaction fees) from you.
If your developer account is still in good standing, you may revise and upload a new instance of the application that is compliant with the developer terms. Before uploading any new applications, please review the Developer Distribution Agreement and Content Policy.
If you feel we have made this determination in error, you can visit this Google Play Help Center article for additional information regarding this removal.
The Google Play Team
Although you might not be happy about Google removing these apps you can always get them from other sources. AdAway is already available on F-Droid. Other ad-blocking apps should be available to download soon from sites like XDA Developers.