Why are ‘Complete Editions’ never truly complete?

Carlos writes "We’ve all been there haven’t we? Browsing our favourite digital store whilst on the hunt for our next gaming adventure, before spotting that Deluxe Edition, Complete Edition or even the typical Season Pass that we just can’t say no to – only to find several weeks or months later that there’s some new DLC on the horizon that simply isn’t included in our supposed ‘complete version’, and that we’ll need to stump up further cash if we wish to get in on the true complete experience."