There is a lot of collaboration between the different instance admins in this regard. The lemmy.world admins have a matrix room that is chock full of other instance admins where they share bots that they find to help do things like find similar posters and set up filters to block things like spammy urls. The nice thing about it all is that I am not an admin, but because it is a public room, anybody can sit in there and see the discussion in real time. Compare that to corporate social media like reddit or facebook where there is zero transparency.
I have hosted a wordpress site on my unraid box before, but ended up moving it to a VPS instead. I ended up moving it primarily because a VPS is just going to have more uptime since I end up tinkering around with my homelab too often. So, any service that I expect other people to use, I often end up moving it to a VPS (mostly wikis for different things). The one exception to that is anything related to media delivery (plex, jellyfin, *arr stack), because I don’t want to make that as publicly accessible and it needs close integration with the storage array in unraid.