Any collected response whether it is approved, un-approved, or live counts towards your plan allotment.
Monthly plans have a limit on the amount of responses they can receive in a single plan payment period which is referred to as “a month”. If you’re on an annual plan you get a little more flexibility each month in how much you can collect because you get your entire “monthly” quota for the year available to you immediately. This makes annual plans a great option if you think you may have spikes in submissions.