authorSTREAM Credits

What are authorSTREAM credits? Why do I need them?
What can I do with authorSTREAM credits?
What is the cost of one authorSTREAM credit?
How many authorSTREAM credits are required to convert a presentation into a video?
How can I get authorSTREAM credits?
What is the payment process of purchasing authorSTREAM credits?
Is it safe to pay online for authorSTREAM credits?
Where can I see transaction history related to authorSTREAM credits?
For how long authorSTREAM credits remain valid?
How can I remove watermark and ads from my video?
Do I earn authorSTREAM credits when other authorSTREAM members download my presentation?