Without much else to go off I can only assume that this implies the CSGO TTT shop.
In short, no thank you. Doubling credits received dips into a dangerous slope of DS players getting powerful items far quicker than regular players. Unfortunately, this sounds too "play to win" to me. Now, if we do something like 1.1x or 1.25x more credits (see: getting 125 instead of 100) it could be considered as far more balanced. Custom Stats