Just want to add another idea to make VIP more interesting for players:
Give VIPs the 20th reward list every 10th run.
How much impact will it have?
Well basicly its one guaranteed itemdrop more than non vips. Which is compensated by pulling an item more or less in the chest in 20 runs. I doubt it will have such a big influence on the game, nor it will turn into pay to win (which basicly offering 20 frds for a particular item is aswell, just a different currency).
It would be a nice bonus, not said the desired item is in that list.