What are the best referral programs you've seen lately in the b2b context?

Yesterday, we had a call with a potential customer, and they loved our demo and asked to become alpha stage testers. After trying out the product themselves, the CEO asked if we have a referral program because they loved what they saw and would like to share it with their friends. As they seemed like the ideal customers for us, I promised to build a referral program for them. I've never created a referral program before, and I'd love to hear if you have any advice or best practices for it. Also, if you have a strong opinion against referral programs, let me know. Some practical questions: • What value can we bring to the companies in our referral program? Are there good examples besides cashback or discount on their license fee? • How much discount do you give to the companies in your referral program, and do you have different types of stages? • Did you make your referral program public or not? My intuition says to keep the referral program as simple as possible and not to advertise it publicly on our page, at least before we clearly understand what type of companies and value it gets us. For context: We're building Focal (www.focal.inc) for marketing and design teams to store and distribute their creative assets better. We use AI to tag assets and have a set of collaborative tools to help teams co-create better.