I think there are entire servers that mirror reddit and they are consistently defederated. My view is that if I wanted to be on reddit, I’d be there. It has a lot of not content that I would rather not have on the fediverse. Also, because the content is just synced, the original poster cannot react to the content on the fediverse.

If there were a bridge where responses from the fediverse would be copied to reddit, it might be more useful. In its current form, of just feels like content-stuffing.