Allow subscribers to change their payment date on subscriptions
Right now you are charged for your subscriptions based on the date you subscribed, so you subbed on the 20th, you get charged on the 20th. I would be great if you could change that date in your settings. This would also included subs like Turbo. Say, charge subs on the 1st of each month or whichever date works best for me.
As someone who prefers to get all expenses out of the way early in the month, this would be a wonderful option to have.