The "30 Day Gem Payout" in the premium shop gives you Gems to collect every day for 30 days. If you are interested in supporting us and buying Gems, this pack is a great option in that you get the most Gems for your money.
This feature is dependent on the player returning to the game each day to claim their gems. Upon purchase, you will be charged (on the first day). To get your 25 gems in the days following, you must enter the game once in a 24 hour period and tap the gem icon on the right-hand side of the screen. Your 25 daily gems will then appear. If you do not claim them within that 24 hour period, they will disappear.