Money and sales charts

Being top of a sales chart was a big deal a couple of decades ago as it usually meant a product got better placement on the shop shelves

Also marketing budgets can be focused on different areas at different times

And localisations taking time and not wanting to cannibalise sales of a local version with imports

Also regional pricing, they could sell more in poorer countries for lower prices, but they didn’t want to give up the greater amount they can ask for from richer countries