Creating free tiers

We have a use case where we are using Ghost for internal newsletters so we don’t want to use Stripe or paid subscriptions.

We still want to be able to allow users to sign up to different tiers (free tiers) to allow them to select what content they wish to see for posts and newsletters, is this possible?

Maybe a simpler solution would be to use the new multiple newsletters feature? Your members can select which of your newsletter(s) they’d like to receive: Ghost 5.0