You may miss some content, yes. The free relays can have bot accounts clone indefinitely though while paid relays would cost them.

Nosessence clones itself constantly so it cant be blocked. I had to remove myself from relay.nostr.band to reduce the frequency.

Im not an expert though... Ive been on a perma ban binge myself and havent looked into paid relays yet 😅 Its just what other experienced users tell me