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NOTE:
I just visited the place.
Https://steemit.com/@drugwars
Many people think that spending STEMM, then point INSTANT UPGRADE, the building can be upgraded, thinking that can don't have to spend the game's supplies,
As a result, his STEMM was deducted, but the building still did not upgrade.
I See everyone's statement, they seems are say :
Point INSTANT UPGRADE, you have to spend your STEMM, he will make your building's construction time to 0, upgrade directly, but if you are not enough resources, it is still upgrade failure.
INSTANT UPGRADE is to change your building time to 0, so you still have to have resources to upgrade .
If you there are not to be no resources, you can also click INSTANT UPGRADE. The result is it deducted your STEEM , but the building has not to upgrad because you have no resources.

Thanks for the info, @cloudblade.

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