If your subscription balance is running low, you can always top-up your account with any amount of your choice using the add credits option.
This is a prepaid amount that will be used once your subscription balance runs out while trying to run an automation.
Any top-up balance remaining, at the end of a subscription term, will be carried forward to the next billing cycle.
Credits can also be automatically aded via promo code, should you be lucky enough to receive one! If you have a valid promo code, feel free to apply it while adding credits to your account.
Please note the add credits features is not available in the Free plan, you must be subscribed to a paid plan in order to add credits.