A painted perimeter board is sold once, to one sponsor, for a season. It is the club’s advertising inventory and it is fixed at one unit.
A screen in the same position is inventory the club can sell many times over: a rotation through the match, different sponsors at different games, a live message when something happens on the pitch. The same square metre earns several times what the board did.
DSD supplies the screen, the mounting and the content platform that schedules it, so the club’s commercial officer changes a campaign from a laptop rather than repainting a hoarding.