How is neptunium paid out?

As the title says.
What is the mechanism for neptunium to be paid? The rules state it is 1kilo per base for each mine you hold each day.
But is that paid out as a lump sum, e.g. at midnight each day, or is the payment staggered out over 24 hours.
What happens when I build or take over a new mine, do I get a lump sum, or do I need to wait for the next 24 hour payment?
Any advice/guidance will be gratefully received
What is the mechanism for neptunium to be paid? The rules state it is 1kilo per base for each mine you hold each day.
But is that paid out as a lump sum, e.g. at midnight each day, or is the payment staggered out over 24 hours.
What happens when I build or take over a new mine, do I get a lump sum, or do I need to wait for the next 24 hour payment?
Any advice/guidance will be gratefully received