It is strongly recommended for sellers to get in contact with PayPal at least 2 weeks prior to a launch to discuss your upcoming launch, projected earnings, provide proof that you can support the increase in business and to further clarify any questions PayPal may have.
Having this conversation prior to a launch can help with disabling certain risk flags that cause a seller’s account to be restricted due to a sudden increase in volume.
You cannot have a $0 balance in your account. There have been many cases where sales are instantly reversed when the Paypal account has a $0 balance. This was resolved by adding a balance to the Paypal account. JVZoo recommends keeping a $100 balance in your Paypal account at all times and enough to cover a spike in refunds during a launch.