They already do. And anyone selling through any platform where they've all data let it be supermarket chain or e-commerce platform, should understand the risk

They already do. And anyone selling through any platform where they've all data let it be supermarket chain or e-commerce platform, should understand the risk that their data can be used to compete with them if you realize risk is not worth pay off, prefer selling on own website - it's not hard these days. No I mean, yes it's still hard to get eyeballs on your product but to list in Amazon, you need to pay Amazon tax.