Plus (Tier 3) gives you the following:
Every month:
* 15 Blacksmith Coins
* 400 Crystals
* 3 Speckled Eggs
Passive perks:
* 15% off everything in the store
* +60% AFK Crystals
* More crystals from voting: +3 Crystals per vote
* 2.2x Mines Crystals & Money cashout
* 1.6x Opal Pieces from the mines