Is your intention to have local copies of content from popular servers and read it locally? Major communities like news., memes, etc?
Many people seem to think this is offloading the major servers like lemmy.world - but I think the opposite is true in my measures of how lemmy_server performs. There is a lot of overhead to each additional instance in Lemmy 0.18.3 backend. Lemmy code does a lot of work to keep each of these subscribing servers updated with every post, comment, vote, person - attempted in real-time.