If history is any indication, I feel that what will happen instead is that someone else will start to sell "carbon offsets" for cheaper that secretly aren't quite following the spirit of carbon offset in some obscure overlooked sense. Then when the cat is out of the bag many years down the road, the big corps get to shrug and say "hey I did my part buying them" in some corporate speak that makes them sound good, and the rest of the public gets to feel smugly superior by tweeting at each other that Chinese carbon offset sellers or whoever aren't being ethical. Meanwhile the world continues to burn down, rinse and repeat until food/resource wars start.

And then you have laws and regulations for what is a valid offset.

Its not like this is a new problem - regulation of markets for fake goods has been a thing for a long time.