what happens if I exceed the bandwidth, form submission and CDN storage limits on the lifetime agency plan?
You would need to pay monthly subscription for the use of data above the lifetime limits.
So for example, if you one-time exceed like 20GB Bandwidth, we wont care, but if you are exceededing 100GB every month, you would need to take monthly subscription that covers the amount of data you are exceeding.
Do you mean that Bandwidth, form submission and CDN storage is reset monthly?
Yes, except CDN storage.