Finally you acknowledge the fact that YOU increased the base price, but what you fail to understand how Itch works is that if you increase the base minimum then all purhases made before will no longer work since the minimum price has been increased therefor the unique download page for past purchases will no longer register a new version with a new price. That's how Itch works and that's how it has always worked.
Also the app does the same thing, it checks the backend pricing and will not let you download if your purchases does not meet the current price, therefor your bs increase is literally scamming ppl of their purchases.
Edit- After consulting the pricing doc
You must be registered to see the links
what you are doing is setting a individual pricing for ever new release "
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. " this is taken from the link and this would explain EVERYTHING