I say again, you DO NOT NEED PPT to buy invoice. You can buy them directely with bitcoin and ethereum or by wiretransfer just by buying GBP TOKEN. This is explained in the whitepaper. So for everybody who think people must use PPT to buy invoice, this is NOT TRUE. PPT is not useful and will go to zero.
You have no idea of whats going on with this project! Its sounds like you are not in Slack or Telegram. Join and get right information.