this is not the problem that people are grappling with, though! the problem is that amazon can see that your product is doing well by looking at "their own" platform data and then competing with you based on your own sales data. I would hope that anyone entering in to a market that Amazon, or any big player, is in would already be aware of their competition.
Amazon can choose at any time to peek at the data and simply flood a market that they know they can dominate on their own marketplace -- does that not seem unfair to people? It seems to me that as long as Amazon is able and willing to profit off of sellers' and services' data on their platforms, they will incentive their employees to take advantage of that in the name of ~Consumer Value~, all else be damned.