Good example! I see where I might have misguided you. The way we pay for data is the following: we pay and send chunks by batches (default being 64 chunks), so the hour frame is the time allowed to upload those 64 chunks. Each batch goes one after the other until we finished all the 28,000 chunks. So the time frame isn’t per file, but per chunk, and the biggest concurrent competition a chunk will ever have is with its own batch!
This means you need an internet connection of roughly (64MB / 3600s = 18kbps) to be in time.
But then one might ask, how about with HUGE batches, like 28,000 chunks? Having HUGE batches would create a world of problems on its own, from memory usage to transaction/spend/cashnote size (why here), and thus would not necessarily increase throughput.