One of the commenters from the original post shared it on Reddit.
how does bluesky work anyway?
It is basically Twitter 2.0
why do they have instance names like on fedi?
I believe Bluesky is Fediverse compatible can interact with the Fediverse through an ActivityPub bridge. I am not familiar enough to know exactly how it works. That said, if you own a URL, you can set it as your username. For example, John Scalzi (the author) linked his account to his URL so now his username is @scalzi.com.
they are not decentralized, are they?
Not at the moment but the protocol allows for it IIRC.
EDIT: Corrected my incorrect amd misleading comment.
Bluesky deliberately chose not to use activity pub and made their own instead of extending it. I don't think they have made strides of federating with the fediverse.
They seem to be determined to create their own federation protocol, which they claim that they're going to hand over to a non-profit to become a standard. Or something like that. I'm not clear on the details, and I don't know enough about internet traffic handling to understand it. I just know they use their own node infrastructure to handle traffic between different hosts for user accounts.
Oh! I thought bluesky was literally Twitter and just as cooperate. Sooo can I use ma Lemmy account to contact people on bluesky? Or can I follow them somehow?... I really don't understand the whole activity pub stuff and compatibility yet...
Also, the reason I mentioned the redddit thing was cuz I'm like "damn, peeps now almost only see good posts as secondary reposts on reddit, big sad"
Bluesky uses the AT protocol, something they decided to make instead of using ActivityPub. Right now, there's really only the main Bluesky instance, but in theory, there can be multiple.