The way you write this makes it sound like your websites are pulling from the CSV per request. However, you're building static websites and uploading it to a CDN. I don't think SQL is needed here and CSV makes life way easier, but you can swap your CSV with any other storage device in this strategy and it would work the same.
Everything I went to buy something. I told them I want to get X so they sat me down for a few minutes then I checked out for everything without explanation of the product.