No, the amount creators receive does not change.
VAT (Value Added Tax) is a tax imposed on the consumption of goods and services, and is paid by the consumer (in this case, the supporter).
On FANBOX, when a supporter residing in a region where VAT applies makes a payment, the local VAT is added on top of the payment and collected accordingly.
FANBOX temporarily holds this VAT amount and then remits it to the appropriate tax authorities in each country/region.
The amount creators receive is based on the original price tier (before VAT is added), so VAT has no impact on creator earnings.