Paid subscription questions

[Merriweather]

Let's say I have a membership level of A that grants forum access. My user joins in January for 1 year.

Then, in June, they decide they want to subscribe to options B, which increases the features they have access to on the site. They sign up for B for one year.

But then in January, they don't renew A. So then what, they have the features (B) for an additional 6 months with no forum access?

Because of this scenario, I am wondering if there is any way to make add-ons run only until the primary subscription end date?

I know that I could have the option packs be monthly subscriptions, but because they are so inexpensive, it would be pointless to charge a user less than $1/mo. I would like a way to have them be able to add the options on later without then having some strange overlap where they have a feature paid for but no forum access...

[Marco van Herwaarden]

There is no option for this in default vBulletin, and i never saw a modification for this.

[Merriweather]

Thanks for the response!