How can you trust a retailer like Amazon though: they are not only an e-commerce saas, they are a retailer themselves so obviously for anything they see a marke

How can you trust a retailer like Amazon though: they are not only an e-commerce saas, they are a retailer themselves so obviously for anything they see a market they will just offer themselves. They can use the data from 3rd party sellers as market research for free (actually they get paid for their research!).