With a monthly subscription, you get a certain amount of credits every month for a fixed, discounted price. Subscription renews every month automatically.

Main subscription benefits:

• It's cheaper. Depending on the package, you are saving up to 50% (comparing to single purchases).
• It saves not only your money but your time. No need to deal with payments every time.
• Pay less of bank fees. Your bank can charge a fee just for single transaction once a month.