Same boat here. We run an ecommerce marketplace that was sending a few hundred thousand of leads to Amazon every month. After a few years they shut us down for a minor infraction to ToS (which we fixed immediately upon being notified). No recourse to get account reinstated, in spite of us trying numerous avenues. And for good measure, they took the $15k worth of affiliate revenue they already owed us but hadn't yet paid out. Classy.

My conclusion: it's nice revenue while you can get it, but that probably won't be very long. Make money with their program and they're coming for you.