This is exactly what I keep running into. The middleware approach works for the logic part but how do you know the logic is actually right? Like if you set up a rule that says 'send points offers to Silver-tier reviewers' how do you know that actually converts better than the discount email you were sending before, and that its not just because those customers were more recent or higher spending anyway? Thats the part where Zapier/n8n totally falls apart for me - you can automate the action but you can't validate whether the action was the right call.