UPDATE: The servers for this game are no longer online, so all online achievements in this game are now discontinued.
*** Spoiler - click to reveal ***UPDATE, March 2014: Store is back online. Go and get Pack King and the other pack achievements while you can! It is unknown how long the store will stay up for so you should try to get this as soon as possible if you still need it.
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Old Information:
This achievement is now discontinued due to EA shutting down the store. Therefore it can no longer be obtained. This store shut down has also caused prices to rise in the marketplace and the number of consumable cards available to go down. Therefore several other achievements are much harder, such as 100 games with one player and 85 million club value.
young tugboatz has tried contacting EA to get them to put the store back up. Please contact him for information or if you would like to help him in any way.
I had an idea of how to get around the store closure, this is below, BETOBUSTER tested this and found that it didn't work, so thanks to him. I will leave it in the solution anyway, it may be inspiration for a new idea.
*** Spoiler - click to reveal ***It would appear that this achievement is now discontinued, as the FUT store is down, but I may have found a way to get the achievement without the store.
This method involves deleting your club, so only do it after you've finished all other FUT achievements.
You will need to delete your club and start a new one. Open your free starter pack then, if possible open up the manager tasks gold pack that you get for doing all the manager tasks. You then repeat this deleting of the club up to 100 times (or up to 50 if you get the manager tasks pack).
This method is untested and may not work, but I just thought I would say it for those of you who don't have this achievement yet.