Hi. We have it on the monthly schedule because we release it monthly, but not on the same date every time. If we charged every 30 days, there is a chance you would be charged without receiving an update, and we'd like to avoid that.can i piggyback this and ask u have 30 day payment period instead of paying on start of month? i pay $15 few days ago and it will renew on december 1 instead of december 22. why not have 30 day period