With subscriptions, you receive all of your credits upfront, and receive additional credits at the end of each billing period. You have the option to subscribe to a monthly or a yearly plan.With yearly plan, you receive the entire yearly’s credits upfront, and you get 2 month free as compared to the monthly subscription.
If your usage is higher than the amount of credits received within the billing period, you have the option to purchase credit packs.Each credit pack grants 1000 credits, and cost $3 each.