Revenue is income before deductions (as we all know), and Ticketmaster gets a cut of that. The 50% is the revenue, and that's typically what analyst use to determine the worth of a company. In this case, this is A LOT OF REVENUE relative to the worth of the company. Do the math on ticket price, capacity, etc.
These concerts will bring in revenue, most will probably sell out considering the capacity of the theatres used. I guarantee my entire High School graduating class would attend the History of PCG concert, if we could!!