Cash management

I guess culture and finance doesn't go hand in hand. For the second time I went to the opera house to book tickets for that voucher I have (first time they were closed for the summer), only to be told that tickets cannot be booked more than one month in advance. What? It's like my brother says: "If somebody wants to throw money at you, you don't object". If they were to accept money well in advance, they would have more money to "play with" = invest = more return. How stupid is it not to accept early bookings and payment? But I'm not giving up. I will see that Aida opera in October...