Betfair Charges outlines the charges Betfair can make depending on your betting and usage of the API.
It is generally free for most users.
Betbotpro doesn’t really get close to this figure so you should have nothing to worry about unless running multiple sports markets and instances maybe.
You should be careful though if running multiple bots or other software that uses the API as it could add up and compromise the bot performance.
The are currently no data charges for the new Betfair API-NG based software
