I think I explained that before, same applies here.
All PayPal users using PayPal mass payments to pay a recipient absorb the fee. The mass payment is an excel sheet with recipients, and for every line the sender pays a fee based on the amount per line. The fee changes per country and is something like 2% per line with a maximum of $20 per line. When a company uses single transactions to pay a recipient, the fee is paid by the recipient. In this case I suspect VI is paying in single transactions and so you pay the PayPal fee. The height of the % you pay depends on what tier with PayPal you are.
I just joined them, I am actually uploading my whole port on FTP at this instant. I regret it already.