The headline taken from Bauwens article is somewhat vague, because it is not clear what type of value is meant there. In the text he distinguishes between use value and exchange or monetary value. He explains, that the more use value is produced by way of open source and peer production, the more exchange value has been removed from the market:
Thus, the open-source economy destroys more proprietary software value than it replaces. Even as it creates an explosion of use value, its monetary value decreases.