Hello, I want to make a monthly subscription box, and I want the contents of the box to depend on the number of months the customer has been subscribed. For example, if you have been subscribed for four months then you get a green toothbrush, and if you have been subscribed for five months then you get a blue one. I am currently using Seal Subscriptions, and I do not want to manually edit the customers' meta fields by hand every month, how do I automate this?
