Ask What are the best ways to reward long-term subscribers in membership site?

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I want to keep my long-term subscribers happy but I'm not sure how to reward them. Can I offer discounts, special content, or something else? I don't want them to feel like new members get all the best deals. I also want to make sure the rewards are valuable but still affordable for me. How often should I give rewards to keep them engaged? I don't want to overdo it or make it too complicated. If you run a membership site, what are the best ways to reward long-term subscribers?