I'm not sure that the Jellyfin community is that big or active enough that that will be much of an issue at all. Looking at their sub, the highest rated posts are under 1k, so number of people active on the sub is probably somewhere between 100k - 1M.

Your average post maybe has about 10 - 20 people interacting with it at most. Expecting thousands seems... optimistic, especially when the forum numbers puts them at under 300 people.