How to boost partner engagement after initial PartnerStack onboarding?

Hey everyone, I'm a complete noob to PartnerStack and just finished reading the thread about best practices for partner onboarding, which was incredibly helpful for getting started. We've actually successfully onboarded a decent number of partners for our SaaS over the past few weeks, which honestly felt like a big win for our small team! However, after the initial onboarding excitement, many of these partners seem to go quiet pretty quickly. We're seeing alarmingly low activity and very few referrals from a significant portion of them beyond the first week or two. It really feels like we're losing all that hard-earned momentum right after we've got them in the door, which is quite frustrating. We've tried a few things to keep them active: sending automated follow-up emails with additional resources and tips, consistently sharing new marketing materials and content updates directly in the PartnerStack portal, and even attempting to offer one-on-one check-ins to see if they need personalized support. Unfortunately, the response rate to these efforts is pretty low, and none of it has really translated into sustained activity or a noticeable increase in referrals. I'm really struggling to understand what's missing in our approach. What are the common mistakes people make that lead to this post-onboarding drop-off in activity? Are there specific PartnerStack features or integrations that are absolute game-changers for ongoing partner engagement that we might be overlooking? What kind of communication cadence and content truly resonates with partners to keep them active and motivated long-term? Beyond just attractive commission rates, what are some creative strategies to incentivize consistent referrals and keep them genuinely excited about promoting our product? I'm looking for practical, real-world advice on how to keep our partners engaged and actively promoting our SaaS long-term.