Technically it costs bandwidth and electricity I suppose to make information available...
Not suing people for repairing or tinkering with your hardware is also a "cost" I suppose if you want to phrase it that way, because of the lost revenue you would have gotten from locking down the market and only providing overpriced replacements yourself. It's a cost in the same way that a law against stealing purses imposes a "non-zero cost" on all of us, since we don't have that potential source of revenue available to us anymore...
Not suing people for repairing or tinkering with your hardware is also a "cost" I suppose if you want to phrase it that way, because of the lost revenue you would have gotten from locking down the market and only providing overpriced replacements yourself. It's a cost in the same way that a law against stealing purses imposes a "non-zero cost" on all of us, since we don't have that potential source of revenue available to us anymore...