Because you don’t want to find out that your favorite app is sold out. 
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Thanks. Twitter will use this to make your timeline better. UndoUndo
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It’s mainly for developers. Know why before you yak.
Thanks. Twitter will use this to make your timeline better. UndoUndo
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Loaded with bugs, errr “features” free of charge!
Thanks. Twitter will use this to make your timeline better. UndoUndo
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