Yes, just because I use your service doesn't mean I want to see every outage notification status update as an email. Preferably email subscription status would be granular so I can select what I want to get not what some idealized average user would want to get.
I've been a paying customer of rsync's service for more than a decade. The only mail I get is the monthly invoice, and roughly once-per-year notice of infrastructure changes that may temporarily affect availability.
Oh I have no doubts whatsoever the volume is low and the messages sent intended to be genuinely important to the vast majority of customers, rsync seems very reputable based on what I've heard over the years on HN.
It's still nice to have granular subscription though even for rare things you think 95% of users may like to hear about e.g. I've been using a similar service since 2015 and I have 0 interest in receiving their downtime or scheduled maintenance notifications as I don't care enough to take a special action for a failed sync or two in the first place so... I don't opt to receive them and I appreciate that option. I don't get the invoices emailed so I haven't had to think about it one way or the other there.
