In terms of direct evidence of what the FTC thinks, I don't know. But it's interesting that India had some anti-trust action against companies that both owned o

In terms of direct evidence of what the FTC thinks, I don't know. But it's interesting that India had some anti-trust action against companies that both owned online meta-marketplaces and had shops selling in the same marketplace. The theory applies here in that Amazon operates logistics and online presence for a shops, but operates it's own shop with potential information from all the other sellers. Self preference, or selected partner preference may be an issue: https://www.forbes.com/sites/siladityaray/2020/08/26/indian-online-retailers-file-antitrust-case-against-amazon https://www.forbes.com/sites/siladityaray/2020/08/26/indian-...