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The free subscription is good if you want to receive the newsletter in your inbox. For most newsletters, I use RSS with Zapier and Pocket (not the email). I still subscribe to some newsletters to add my email address to the subscriber list in case of potential future migration of that list. As a subscriber, you may comment on any post:

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I occasionally use the paywall to share information without doxxing myself publicly. You may choose the paid subscription:

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Interesting, useful content that everybody should know and could not be found on the Internet before. Hopefully.

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I write what I would have liked to find written to link to it, but I could not. Occasionally I cover topics that may be interesting.