Rep Videos is billed on the first of every month, so if your initial purchase were any day other than the 1st of the month, it would pro-rate the price. This means the number of credits in your account for the first month is prorated as well.

Example: If you bought Rep videos on the 10th of the month, you'd pay the prorated amount of $67, and the number of credits you would get would be 16. On the first of the following month (your next billing date), your credits will reset, and you will get your full allocation of 25 credits.

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