As far as "removing invincitinks" thread was recognised by developers...
Please, add Rarities Booster, that will multiply all rarities by 3. Many players leave the game after they realize that they need too many orbs and fire crystals and it's too expensive. It had to be released with rarities and replace elevator pass. Players have independent loots, so you will not have troubles with it. Also all picked up rarities are bound to players, so they can't sell it.

Let people stay in game and earn some money from it.