How can they do this? – Strategy & Tactics World War 2 Review

I bought this app for $6.99 two years ago and have loved playing it, but today when i entered the app after an auto update they had taken away all of the maps and campaigns that i had before and said that i had to buy the $9.99 deluxe version to get them back.
Review by Nick145534678864236546 on Strategy & Tactics World War 2.