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I think he's using the word in reference to ownership, rather than proprietary vs open source software.
To reword:
...we are left with a network secured by [privately owned] software running on generic computers.
I think this makes more sense in the context of the message, especially when referencing the series of hard forks.
I don't think about the cost or consider the lack of reward. I just downzap what I feel should be downzapped.
I happened to be SN briefly around 3am this morning and I saw a new user joined and their first post was just a cut and paste of your entire Punishment as a Public Good post. Clearly they saw the numbers you did and were trying to get some sats. I downzapped, then downzapped their bio post, then left a snarky comment.
If Stackers want the best possible SN environment they should take the approach that the cost is worth it long term because if the site is riddled with spam, sats farming and garbage posts SN will not likely succeed and that will be a net loss to all stackers both from a community perspective and a financial perspective.
Downzapping can be looked at as a maintenance cost.
Once a runner by John L Parker jr. I ran in college and our team loved the book and guys got tattoos with quotes from it