Substack Cross-Promotion & External Channel Plan

Plan for cross-promoting Substack posts on LinkedIn/X/Threads/personal email/existing website; per-post distribution package: native LinkedIn version of the post (not just a link)/2-3 X or Threads threads from the post/email blurb to existing contacts/embed strategy on existing website if applicable; how to handle the platform-tax problem (LinkedIn and X penalize external links — workarounds include lead-with-value-then-link in comments); recommends Buffer or Later for scheduling