But in Nostr I can connect to multiple relays, I don't have to be in a single instance The monopoly part can occur
That is the only good thing about Nostr. Put that in to Mastodon and find perfection. Alex is doing that with Ditto basically
I'm not very practical in this part but: what difference would you see as a user between having good relays that comply with moderation and using an instance that filters the content and transmits it to the relays ??? is it something like how ditto works ??? I speak from my ignorance 🙏
Ditto functions like other relays except that it's more for building communities like with competing projects to Nostr. When you go to poster.place, you can see posts my by the members there or use the Global Timeline to see all of Nostr. AS an admin, you can block people , hashtags, or links from entering your instance . Helps out with spam all t he time