My understanding is that bundles just give access to the project itself, but none of the individually priced files. This should includes discounts (either on bundles or the game itself).
Individually priced files can only be priced higher than the base project itself, so users can only gain access to them specifically by paying more for the project itself.
Thanks for posting those links, I think they are very useful to this discussion. There’s this paragraph that describes individually priced files in detail:
Individually priced files come with an important distinction regarding ownership: The buyer will only continue to have access to these files if the price they paid satisfies the minimum price you set on the file. This means that if you change the individually priced file to be more expensive, you may lock out access to that purchase tier from existing buyers. We strongly recommend considering how you intend to price your project in the future before using an individually priced file. Use individually priced files for quick bonus content, not to set the price of your content. Use the minimum price on your project to set the price of your product, as this will allow you to change the price at a later time without affecting ownership.