I’ve mentioned this before, but instead of hardcoding it to bbs.boingboing.net, you may be able to deterministically set the comments link based on the post slug.
Using this page as an example, do you know the slug of the page when the author posts, it seems to be based on the post title?
If you do, you could deterministically set the default comments link to:
https://bbs.boingboing/net/t/slug-value
i.e. for the post above you would set it to:
