For our technology services company, we got a proposal from a lead generation agency about revenue share, how to evaluate it? What should be the KPIs and rev share structure?

We are an AI native product engineering studio, with a small team. We recently got a proposal from a decent lead generation agency ( have worked with many similar to us companies with good results ). They have offered us to become our US GTM partner, and willing to work on revenue share on conversion. They just need technical pre-sales support from our end.

I wanted to understand if anyone else have tried this out already, how is their experience, and how we should set the KPIs?