When following a lot of ideas, we get "spammed" by emails on every comment.
It would be nice to have an option to only follow the status change of an idea (e.g if an idea goes from "new" to "on our radar" or "working on it").
This would be a simple, easy to implement approach. A more robust approach would be something like what the chromium team does, allowing multiple notification settings:
Nonetheless, even the simpler approach would help tremendously with the spam.