Whenever you buy a package with the "Sale x2", also known as the Gift of Fortune item, a unique package with double the value for the same price activates in the Limited section of your store. Such unique packages activate for a limited duration of 2 hours and can be bought any number of times until they expire. However, when you buy the x2 offer, it will not double again, i.e., you can only purchase the same x2 offer time after time. The same applies to an x4 value package: an offer 4 times more valuable than the regular one activates in the Limited section of your store. The same stacking rules apply: each x4 package is unique and does not further increase the content of the previously purchased package, so you cannot get x8 or x16 values from such packages.