Sports are slowly returning to the stadiums, but the teams are struggling with the need to play matches in closed stands. They are therefore looking for different solutions to maintain the quality of the show by cheering fans, but also to provide a field to display brands.Borussia Mönchengladbach, a football club from the Bundesliga, presented an offer that allowed fans to place a printed image of themselves in the grandstand for EUR 19. Attendance was 13,000 cardboard fans and attracted…
