Sure there is some minimal marginal cost, but it's so close to zero that it's usually negligible, and the incentive is to basically give it away and "monetize" something else. Your point about games actually just makes my original point. Software is already usually free or dirt cheap, which is why reducing the cost to make the software can't create some "low cost / low value" quadrant. Unless your talking about bespoke software that has such a small market size it isn't worth making today. I could maybe see that area opening up, but even that software would not fit the OP's description of software that "has no owner and is not meant to be maintained"