We used to have a flour mill with a very similar board. We sometimes were forgetful to update it and never paid much heed to it until an incident occurred. We did reset it that day - brought to our attention how much the 0 days mattered.
Very interesting. We had earlier dabbled with audio platform in emails.
As it turned out, most of the money to be made is in email campaigns and for that we created personalised audio whose permalink can be shared with an image inside the email.