Can someone explain this to me thou, the ICO will get you PPP tokens, but the use of it is only to access Services on the platform, and to buy an invoice from someone. That is not that many usages( even thou the services that you can use it fore Is not specified) compared to the complexity of the functions that we pay for to get developed in the ICO.
Furthermore, you state that the buyer will pay PPP tokens to buy a discounted invoice, to who do you pay that? the holder of the invoice, or to the network?
Regarding your 2nd question, I would say both. The buyer can either purchase an invoice on the marketplace, in that case he pays the issuer of the invoice. But invoices are also purchased by the platform itself.