Hole sponsors display sponsor logos on specific holes of the live scorecard. These hole sponsor logos show at the bottom of the screen not blocking any of the user experience.
Hole Sponsors upgrade ($15/event) or Custom + Scoring subscription
Sponsor logos appear on the golfer's scorecard when they navigate to that hole.
Account-wide option: Set default hole sponsors in Account Settings > Hole Sponsors tab — they copy into every new events.
See the image upload cheat sheet for sponsor logo dimensions.