Are the subscription plans based on daily queries, or a monthly total represented by how many per day? For example, my company has a password policy that remin

Are the subscription plans based on daily queries, or a monthly total represented by how many per day? For example, my company has a password policy that reminds users every 6th Monday (we find that passwords changed on a Friday often require an IT reset the following week because they forget, so we try to encourage updates earlier in the week). If we tried your service, would we be penalized for a high volume on single days?