SAN FRANCISCO--(BUSINESS WIRE)--As StubHub, the world’s largest ticket marketplace, turns 15 years old this month, the company also unveils its new brand identity, beginning with the debut of the 2015 fall advertising campaign during last night’s Monday Night Football broadcast on ESPN. See below for a look at StubHub’s new ‘Let Your Fan Out’ spots: ‘Booyah’: https://www.youtube.com/watch?v=qsa8ybB75-4 ‘Giddy up’: https://www.youtube.com/watch?v=w-iQKg2jnGI “September is a big month for us,” sa