Activating "bootstrap mode" on an old community

I don’t think I’ll go ahead with this. I only now realised that the digest mode doesn’t really work the way I though it did:

I thought it was a digest like that of Google Groups or traditional email lists, where a daily email makes sense (if there are new posts. But since the digest (renamed “summary” as of 1.6) only surface “top” posts, a daily email won’t make sense.