Payment, Refund & Discounts

What is the 30-day money back guarantee?
Do I have to sign a long term contract?
What methods of payments I can use?
Can my premium membership fees be refunded?
Can you describe your refund policy?
Do you offer any discounts for students or educators?
I am a Pro member. How much will I have to pay if I upgrade my membership in the middle of my billing cycle?
Will I be billed automatically once my monthly membership expires?
Will I have to pay monthly for Premium membership?