The customers could be around the globe, not necessarily from Europe.
You can just check, how many nodes in Europe: https://storjnet.info, so it’s quite possible that your node is slower than many of these nodes…
This is due the missing reports from the US1 and SLC satellites:
So, this is just incorrect data, thus - incorrect assumption of the unpaid data (the script compares the reported by the satellites used space with the node’s used space and assumes that this is an uncollected garbage).