Configure admin email alerts for Advanced Outreaches

I just set up an Advanced Outreach to push the prior day's NPS results to Slack. However, there are lots of days where no NPS results come in. I get an email alert:

Gainsight support tells me that this can't be deactivated. I would like to avoid having to have a gmail filter simply to delete it, especially since, if I don't build it quite right, I might exclude these alerts from AOs where I [i]do care if no participants are found.