Plus (Tier 1) gives you the following:
Every month:
* 4 Blacksmith Coins
* 115 Crystals
* 2 Pet Eggs
* 1 Speckled Egg
Passive perks:
* 10% off everything in the store
* +20% AFK Crystals
* More crystals from voting: +1 Crystal per vote
* 1.5x Mines Crystals & Money cashout
* 1.2x Opal Pieces from the mines