toot.wales is one of the many independent Mastodon servers you can use to participate in the fediverse.
We are the Open Social network for Wales and the Welsh, at home and abroad! Y rhwydwaith cymdeithasol annibynnol i Gymru, wedi'i bweru gan Mastodon!

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Gomez :wales_flag: :twt:

@shuttersparks@social.isurf.ca if it's a plain vanilla wordpress install then

HTTPS://blogname.domain/?author=n will send you to the author page for valid values of n (starting at 1)

Plugins like wordfence will block this behaviour.

Does that help explain it?