Deal of the DayEdit
As of version 1.0.961.0 players are presented with a customized “DEAL OF THE DAY.” This is a deal tailored to the individual and presents special pricing on an item that the user does not already own. The timer for the deal of the day resets at the same time as the timer for the First Win of the Day.
Gold vs XPEdit
Reddit has a detailed breakdown of Gold vs XP.