I think I could more easily recruit people to come join me in my private group on a specific common interests topic that way... Just like if I was to invite them to a telegram group.

But now they are on Nostr and can explore.

Is this the nostr:nprofile1qqs2qmchl7cehazc2ljewjkghvd754up39uxa6j93ezrhhuv84fnh5cpzdmhxue69uhhqatjwpkx2urpvuhx2ue09ft07q ditto servers route or are those mainly publicly accessible?

I am still green with y technical understandingband knowledge on all the intricacies here.