The price board is the free part
Digital signage costs you nothing here. Digital signage means a screen that shows content. Software and dashboard are free. The booked ads pay for them.
Your price board runs at no cost. Roll prices, pastries, lunch deal, opening hours. You change them in the browser and the screen shows it at once.
A printed sign is wrong the moment a price moves. The screen never is.
Booked ads run in the unsold time. You earn from them. Your share sits between 30% and 60% of net ad revenue, depending on your ad share.
There is a queue at your counter anyway. Those minutes are why advertisers book a screen above a counter.
Other providers charge you a monthly fee per screen. We do not.