That said, I don’t mind Post adding ActivityPub integration.
Just acknowledging Mastodon means that their walled garden is compromised. And actually adding compatibility with the Fediverse means they need us to survive.
Make no bones about it.
As the Fediverse grows, it will be harder and harder for social media startups to build their network effect from scratch. Why do it when ~12 million people already use an ActivityPub compatible app?
This is the audience that Post is missing out on.
Post is already implying that their monthly active users (MAUs) are at near parity with Mastodon’s.
However:
1. Due to decentralization, any report of Mastodon’s MAUs is speculative whereas due to centralization, Post’s are not
2. Whatever the stats on MAUs, there’s more conversation happening on the Fediverse than on Post
Post’s MAUs are not comparable to Mastodon’s MAUs.