Promotional membership or paid subscription: How do you handle both?

Quick question for app founders: Have you ever run an in-app membership giveaway or promotional campaign?

We’re exploring ways to reward users with free membership time through special campaigns, but there’s one thing I’m curious about: How do you handle users who already have an active subscription?

For example, if someone is already a paying subscriber and then claims a free membership reward, do you:

• Extend their existing subscription by the reward period?

• Start the free membership after their current subscription expires?

• Apply the reward time in some other way?

Right now, we’re manually extending users’ subscription periods whenever they claim a reward. It works, but I’m wondering if there’s a better way to handle this.

Would love to hear how other teams approach this, especially if you’ve built similar promotional campaigns into your apps!