In order for us to trace subscriptions and payments for legal issues it would be necessary to be able to export lists with as much information as possible. I guess it would be a very small feature to implement to the export function in order to choose which data to export, right?
Data such as address, paid tax, phone, etc should of course be standard fields to be able to choose from if you'd ask me. This can be found in other membership extensions and should increase the benefit of Payplans tremendously...
Cheers,
Stefan