[mehwoot]

Supermarkets sell promotional space and in some cases access to have products even appear in store, either through discounts on the wholesale price or straight up charging for it. They absolutely tilt things in favour of their own brands, and in some supermarkets in some categories don't stock any non house brands.

Spotify has discovered there is a big market for music where the quality isn't that important and they can serve it themselves. Same as supermarkets do with many products.

[gregw2]

You are right about supermarkets charging for shelf space in various ways, and to add to that I think it's even worse. I've heard the supermarkets and other retailer dub certain brands for certain products as "category leaders" and basically give them control of the entire shelf space of their category, including that brand's competitors. Which products and varities get stocked, how much, and placement. That brand is then in charge of maximizing profitability of "its" section. I'm not sure how that isnt an antitrust problem, but...