That is kinda disappointing. I had a distaste for Brave after all the initial controversy regarding the ad blocking, which only got worse from the crypto crap they now have in the browser.
I'll still keep paying for Kagi, but this is a step in the wrong direction in my opinion. Let's hope at least the results get noticeably better.
It's an ion thruster, not a rocket per say. You cannot use it in lower atmosphere at all (well you can but it doesn't do much), unfortunately some of the propellant would still find its way to the atmosphere.
The market of small thrusters for steering satellites is much larger than building actual rockets that take those satellites to orbit.