More users will come over time with better clients and more censorship from popular social media platforms, not worried about that.

Will be interesting to see how spam control is handled in either the protocol or in clients though. I know there have been discussions about using PoW on events but not sure how widespread that is today though.

Re: moderation, block/mute lists could probably be built both for the protocol as a NIP and in the clients but not sure if someone is working on such a feature yet