So, it's likely that Amazon is making a little more from those who pay to skip ads, but it's in the ballpark. Plus, the people advertisers want to reach are the people with the disposable income to pay to skip the ads. They don't want the cheap people who are willing to waste nearly two hours of their life a month to save $3.
I think you might have miscalculated the CPM since you've said "that’s a CPM also in the order of a penny." It's on the order of a penny per viewer, but not per thousand viewers. That's probably why you think it's more of a bluff that could be called. It is likely more revenue if you pay to skip ads, but Amazon would probably end up making $2 from you watching ads.