I created [email protected] a few days ago. Now it has >4k subscribers. I credit that to my meticulous reposting of content from other places (90% from /r/maliciousompliance, 10% from elsewhere). It took a bit of effort but now people are posting their OC.

A site like this needs to reach critical mass to be self-sustaining. I see a lot of new communities with 0-1 posts from the mod. That’s not nearly enough to get people engaged - users are going to see that it’s a ghost town and leave. Reposts are a temporary measure to get past the chicken-and-egg problem of "there's nothing here so people aren't visiting" and "people aren't visiting so they aren't posting stuff".

Reddit itself exists on reposts. As a (ex-)Redditor of 12 years, I've seen countless reposts. Ideally, reposts make up a small percentage of the content, but given the small nature of this universe, I'd personally encourage and advocate reposting of content from elsewhere to kickstart discussion.