companies subsidise their products so that exploration of these products is more feasible due to lower initial costs for the end consumers. the initial consumers don't pay the full price but they are borne by the later consumers once the exploration is done and they have knowledge about that market and business.
Cory Doctorow also probably confuses democratisation and enshittifaction - its usually the case that products get cheaper by also marginally reducing the quality. we get cheap goods from China but that's not enshittification - that's just efficiency. as a consumer I'm happy I have the option of paying low prices for products.
i wouldn't take this person too seriously because it looks like they don't understand the larger picture