Here are some ideas for a discussion site with subscriptions:

1. Subscription Tiers
Free Tier: Limited access to discussions and basic resources.
Premium Subscription: Full access to discussions and advanced features (e.g., creating polls, private messaging).
Pro Subscription: Additional benefits like access to exclusive webinars and premium content.
2. Exclusive Features
Private Forums: Sections reserved for subscribers, allowing for in-depth discussions.
Special Events: Invitations to live Q&A sessions and workshops exclusive to subscribers.