The method is nothing more than arbitrage which is nothing new but anyone using paypal needs to be aware that such payment method is reversible and you must avoid making any deals that have to do with bitcoin through paypal or you may regret it.
Why do you need to conduct financial transactions with Bitcoin through PayPal? Maybe I'm still not very much versed in this topic, but it seems to me that you have to act quite differently. The more such amounts Bitcoin carry through doubtful funds is undesirable.