I was coming to say this too haha. They think he/she runs all their daily bots and stuff right at midnight and all the page refreshes bring the site...
I was just coming here to ask if they will show up on mobile, as I had been looking all throughout the day and not find a single one. And wouldnβt...
We have been spoiled 3 so far I believe. If the plot goes for the next 8-10 months then there should be hopefully 15ish stamps to collect.. hopefully...