Every channel has its own failure mode, and almost none tells you why. Here is what was measured channel by channel — and what to do instead of pushing harder.
A low-karma account's post is removed by an automatic filter, with no explaining message. It is not a “shadowban”: it is karma. Pushing harder burns the account.
What to do: participate before promoting — useful comments in existing threads, for weeks. The promotional post comes later, and only where the community allows it. While karma is low, do not insist: publish where you already have reputation.
The post button shows aria-disabled=true and looks like an account block. Most of
the time it is a character limit: the URL shortens to 23 characters, but the text around it
goes over the ceiling. Trim the text and the button comes back.
What to do: consolidate into one short post instead of a thread. A 260-character post publishes; a thread whose first post is 331 publishes nothing.
Publishing through the UI works (title + body). Two traps: the tags field ignores synthetic typing (it needs text insertion plus clicking the suggestion), and the canonical URL does not exist in the editor — only through the API, with a key the account has to generate.
What to do: publish through the UI and fix canonical later with an API key (or accept dev.to's default canonical).
Checking “did it publish?” by looking at recent activity or your own feed gives a false negative — your own posts do not reliably appear there. The correct check is to open the public profile and look for the text.
A specific message to whoever owns the problem (supplier, maintainer, partner) arrives, gets read and gets answered — while the generic post competes with a thousand. Two well-written emails today produced two business conversations; no post produced one.
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