I meant, in the first few days I found at least 2-3 tickets at a time and even as much as 4 one time. They were really hidden and sometimes only saw a glint of one. Towards the end they were always in the open, and only one per day if lucky as my day was not the same as the counter.
Well, like I said, you get tickets from quest rewards, a ticket per completed quest and a ticket a day hidden in your city. If you were finding more at the beginning, it's probably because you had completed multiple quests, that's how the event works.
I also gather that GB production does not count as 24 hour supply production even though the Luau 24 hour production counted and the Oasis 24 hour production didn't count. The quests in future events should specify what exactly could be used.
GBs and Oasis are not production buildings so would not count towards this quest as it is the building type that's important here. Production buildings are your supply buildings, plus Luau's, Bazaars and I think Mad Scientist Lab, basically the ones with the 5min, 15min, 1h, 4hr, 8hr and 1 day production options.