Until T847 is fixed, unregistered reporters should at very least be added to subscribers. Currently this report isn't associated in any way to the reporter kunalgrover05, while it has one and only one subscriber (Nikerabbit) https://bugzillapreview.wmflabs.org/T7194
We sent a couple generic emails (T618), but
- only to active users,
- without reminding them why we think they care (the reports they filed/were following).
It's not clear how many emails were actually received but the progress so far was minimal: we have thousands of "orphaned" open bugs, where the reporter is not registered and hence is not following them.