It's a bit tedious with Migipedia: Sometimes I get an email notification that a new comment has been posted on a topic, sometimes not. Maybe it depends on the "section"; as far as I can see, I don't receive an e-mail notification about new comments for "ideas" on how to improve Migros. However, it would be very nice and desirable if you always received a notification so that you don't have to keep checking Migipedia to see if you've missed an answer somewhere.