I think it would be very helpful if you integrated payment system in your Q2A. When customers order one question, they would choose option 2: Free and Premium (questions have often been more concerned with fee). When people answer questions, they get bonuses.
Forms of Payment: Paypal, VISA, Bitcoin, Payza ..as JustAnswers.com
I hope masters help me complete this feature. I am very happy to receive your feedback. Thank you.