Ibis

In case of Lemmy most initial users came from subreddits that were banned, specifically communist ones. But that is unlikely to work for Ibis, as people banned from Wikipedia have many alternatives such as setting up Mediawiki. Other people who joined Lemmy early were excited about the technology, and open source in general (which is why those topics are still so popular). So open source and fediverse enthusiasts are more likely to join.

Besides Ibis is still in a very early stage, so far there are not even any mod tools or account settings. So for the moment its more important to get programmers, designers, testers and other contributors to develop the project. Once some of these major features are implemented, it will make more sense for general users to join. But I dont have a specific plan for growth, hopefully growth will simply happen organically over time like it did with Lemmy.