I understand how to set up a processing rule, but what I don't understand is if I exclude it from referral- where will those conversions get attributed at that point. the issue I'm having is that we use last click attribution, so I need it to attribute to the last click BEFORE they were taken off to...

Hi- I recently launched Paypal and am now seeing it show up as a referral (since when you pay, you are taken off site to paypal.com then you come back in).I know I can set up a rule to exclude this traffic from referral, but because we use a last click attribution model for conversions- where would ...