> Essentially these are unfair business practices, product cross subsidization to ensure market dominance.
Offering a different discounted rate for a service, though their first-party platform is not an unfair business practice whatsoever, though. The bar isn't what you disagree with, or what you think their motives are without any substantial proof. They could even make a honest argument that they can aggressively key-value cache default prompts from their own software reducing inference costs.
>See also: Microsoft and a whole bunch of other companies.
What does that have to do with Google?
Offering goods or services below the cost of their production is often illegal, though. It's called "dumping".
Although in this case it's probably impossible to define, given the complexity of calculating the true cost of tokens.