It's about condition of game stores in Poland. When they were releasing new armies every motnh, store owners did not manage to sell previous army packs and merchandise was left on the shelves. People just didn't want to buy multiple army packs at once/in short time intervals, so Portal slowed the tempo of releasing reeditions of old armies.
Which armies are missing as 3.0? Dancer? Steel Police? And Mephisto? Anything I don't know about?