That's the cost of one employee (and not an expensive one). Do you think it's impossible he's getting more value from the AI than he would from a single employee?
It might, in fact, be that you are more successful with your approach. I have no idea. Congrats if so.
But I think it's odd for you to now say it doesn't matter whether or not his AI token use is leading to success or not. I personally think it's actually really important to learn whether/when this approach is smart.
But you could use tons of autonomous agents for all kinds of things. Probably shouldn't, but you can.