PayPal PreApproved Payments
问题 I am using PayPal PreApproved payments for my crowd funding website, where project backers are only charged if the project is successfully backed. I am worried that high rate of payments will fail when the PayPal API tries to collect the funds when a project is successful: a backer might not have any funds in their PayPal account a backer might close their account once the project is successful (to intentionally stop payment) a backer might remove/cancel their preapproved payment etc... There