So I just logged after the starting period of this campaign, and saw they gave 3 supplied when I had 0 when the campaign began. I had an upcoming supplied scheduled in 30 or so minutes after the start of the campaign so I waited for my upcoming supplied, it only gave 1, and a period of 4 hours to get the next supplied.
So unless they give 3 supplied at every reset or at some point of the day every day, and not just at the start of the campaign, this will be as I feared, only a increase in the "maximum" amount of supplied fuel, and not that they're going to be giving payers in any way double the amount of units through this period.