From Game Spot:
Pokemon Go developer Niantic has announced an extra event for those who purchased Pokemon Go Tour: Kanto tickets. Because technical issues allowed some players to access that paid event without a ticket, the studio will hold a bonus event for those who did purchase a ticket.
“Trainers, Thanks for your patience while we looked into the Pokémon GO Tour: Kanto ticket issues. We will be hosting a bonus event for all paid ticket holders at a later date,” the studio explained on its official support Twitter account (via Eurogamer).