Two fundamentally different ways to show up on an existing platform or community.
Drop your existing content into new territory. Cross-post the archive. Point the same megaphone at a different wall. Broadcasting.
This is what most “platform expansion” actually is. If you arrive on a community platform and pipe your existing content there on a delay, you are extracting whatever visibility that platform generates without contributing to what makes it worth being on.
You arrive as an audience-builder rather than a participant.
Engage with other people's posts. Write things that are native to the platform — the right form, length, and register for that space. Read. Comment. Show up as someone who belongs to the community rather than someone using it.
The distinction matters because community platforms have accumulated goodwill and culture built over years. Arriving as a broadcaster extracts that goodwill without adding to what made it worth being in.
POSSE (Publish on your Own Site, Syndicate Elsewhere) is not the same as pure broadcasting. The syndication half of POSSE is meant to reach your existing audience where they are — not to extract from communities you haven't participated in building.
The test: are you adding to the conversation, or importing a monologue?