The Maxmind fraud filter is reasonably effective at preventing fraud but the current implementation doesn't support Paypal transactions. We've had situations where someone has attempted to make a fraudulent purchase via stolen card (NAB Transact gateway) which has been blocked by Maxmind then they go on to make the same purchase through Paypal where it is accepted. The Maxmind service does support Paypal, Neto's implementation doesn't.
https://support.maxmind.com/minfraud-faq/minfraud-services/can-use-minfraud-assess-risk-paypal-transactions/
