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Why is Pixelfed an extra network and not just a Mastodon client?
(leminal.space)
A community to talk about the Fediverse and all it's related services using ActivityPub (Mastodon, Lemmy, Mbin, etc).
If you wanted to get help with moderating your own community then head over to !moderators@lemmy.world!
Learn more at these websites: Join The Fediverse Wiki, Fediverse.info, Wikipedia Page, The Federation Info (Stats), FediDB (Stats), Sub Rehab (Reddit Migration)
The simple answer is because Mastodon is a microblogging platform that allows a maximum of four images per post. Pixelfed is a platform for sharing images that can display any number of images per post. The two platforms communicate with each other via the ActivityPub protocol, but have different orientations and target audiences.