In order to have MassPayments/Payouts enabled on your live account please contact our Customer Service that can give you some more information on that. Alternatively please check this link Consider that there is a set of requirements that need to be met before enabling this option.
It's been a week of messaging and calling PayPal Customer Service (both in the USA and Russia), I cannot find anyone who actually knows what and where I should submit in order to gain the access to the Payouts API: most of the people learned about the feature from me. Please, advise!
