It isn't easy to make a reliable study

It isn't easy to make a reliable study about this subject because it only works with a huge sample.From what can be gathered from the name of this game alone, they've been focusing on Cheap Fifa 16 Coins  promoting the Ulimate Team mode, which should not seem like a bad thing at first.

Imagine, for example, that you open packs worth 3 million coins. If you open an extra pack and pull a Ronaldo IF card, your conclusions will be completely distorted. It is not possible for a single person to open enough packs to conclude if it is worth to buy packs or not. We did it but we combined our results with the community experience to conclude that, in a general way, you get back 60% of what you have paid by the packs.

The other 40% are EA's profit, ie, your loss. The same happens in the famous bookmakers sports scores where part of  Fifa 16 Coins what you bet reverts automatically to the house, regardless of the result. Usually, they keep with something between 10 and 16%, but EA is not satisfied with less than 40%. http://www.fifa16shop.com/