Biochar is an attempt to make a product from the effort, and it's a leading one we have. It's still better for the net result to just bury the carbon without trying to gain anything. But like I mention above, that's a literal money sink and no company would do that without being subsidied for the effort.

Maybe. It's of fairly limited resale value compared with the cost of producing it and transporting it. I don't know of anybody making it near me with the expectation that they can profit as a result; I mostly see small-scale production when doing things like disposing of hazard trees