ChatGPT Plus lists at $20 a month, but what you pay can vary. That’s because...

https://xeon-wiki.win/index.php/Why_Does_Google_Play_Add_Cost_to_ChatGPT_Plus_if_Google_Takes_15%25%3F

ChatGPT Plus lists at $20 a month, but what you pay can vary. That’s because VAT or GST taxes depend on your country, and if you subscribe via an app store, they add their own fees