The newsletter costs $5/month or $55/year for an individual subscription. This gets you full access to all old briefing notes and any new notes as they are published. You also get answers to questions via email on topics covered in the newsletter.
Can I forward the emails?
When it comes to the free posts, spread them as far and as wide as you like, on whatever platform you currently prefer. Occasionally forwarding subscribers-only emails is just fine too.