I noticed something a little weird about a few popular games like candy crush or farm heroes saga. Both games have Money which can used to buy boosters, life, etc but only when online. But without internet connection, I can't buy any of the items for sale even though I have money.
So my question is why isn't it possible to make off-line purchases with the money which is already present?
In my game, I plan on making gold coins to be the only item that can be bought from apple/google etc. Then the boosters and such can be bought with the gold coins. Will I run into any trouble if I make off-line purchasing possible?