Hi @dazzerr – It’s possible to do this, but it won’t be particularly easy.
There’s a filter ‘ass_digest_format_item_group’ that you could use to filter the markup generated for each group’s section of a digest email. Using this, you could either modify the existing markup (DOMDocument or whatever) or you could rebuild the markup to do exactly what you want. Not extremely elegant, but possible.
Keep in mind that, if you do something like this, the truncated items will still be deleted from the digest queue. I think this is probably want you want in this case, but it’s important to note, and there’s no easy way around it at the moment.
If you have ideas about how this might be made easier, say with the introduction of new filters, I’d be happy to consider a patch or a pull request.