From someone who has been an Affiliates Before, the irony is
Not so much in the reward, but if there's a Structure that makes it super easy for Affiliates to get people on your onboard your product. Especially if you're trying to get sales teams to port form their already existing saas tool.
Most would prefer a good one-time commission
But the best I have seen so far is to get sales team actively doing EGC, contents YouTube, influencers with a considerable good following to use your too in a way that really serve them
And collaborate with them, people would naturally want to Join in.