I don't know what PDS is but Bluesky is just a Twitter clone.
After having 2 accounts banned on Twitter over the last several years each time losing followers that I spent years obtaining, I got sick of it.
I still have my account on "X", but I rarely post and only use it to read the accounts that matter to me.
Mastodon is like "The Seed" from Sword Art Online. And that is very appealing to me.