巴黎到Beauvais机场交通问题

机场官网上这么写的：Bus Tickets Sale Points are opened before each shuttle departure. Do not worry: all our passengers are conveyed !
Shuttle bus 官网上写着：The tickets - 16 Euros one way - must be purchased directly on the bus.
是说现在不用预定也不能预定了吗？最近有没有人坐过的？