I have just passed up on Rhize and Smoulder cards in the fair because 1830 gems is too costly to get dud buffs like so many others have been getting all over the forums. I can guarantee that I would have made another deposit today, putting me on VIP 7, if there wasn't a chance of that happening. Luck is all well and good and a chance for any of the other saint buffs which are less desirable or weaker is fine but getting a totally worthless one is too much of a gamble. I am sure that if you make small changes like fixing saint buffs and have a little less control over tavern you would be making a lot more money. More people would use fair and buy chests for rare heroes. Try be creative in your rigging, dish out more rare heroes and cards when people are lower on credits or put up more 3x heroes on a page so people spend gems to get a guaranteed 3 turn hero. It's not rocket science, it's human nature, use it to your advantage and you'll have a more successful, more appealing game at the same time.