I ran a biz op business last year and it's a fucking pain in the ass compared to AM. Dealing with customers, refunds, payouts, it's a nightmare. Not to mention you're stuck with one offer that you HAVE to make work. In AM something doesn't work or stops working, you move on to the next thing, no baggage or thousands of customers to offer customer service still.
Running an offer vs doing AM... pff not even close.