Ha! Look, for example, in the "crystals" tab. 1 crystal per hour. Well, 2, if you've been playing the game for a very, very long time. At the same time, upgrades cost 100-300 crystals of the theme 1000-50000. 50k! This is about three years with an income of 2 crystals per hour :) The author clearly hints that this is a LONG game :) And are you surprised now that the income of the resource is irregular during the day? Seriously?! :) Yes, you can look in there once a week, more often there is no point. And in such conditions, the daily frequency does not play any role.
And this is if my observations about periodicity are generally correct. But I can be wrong or understand something wrong :)