That seems... fine? Tech companies like google don't emit that much carbon to begin with (compared to companies that do stuff irl like making stuff), and they have high enough margins that they can afford to spend a few % of their profits on offsets. That seems better (for the environment at least), than paying out those profits to shareholders. They also can't go entirely pollution free because the supply chains and vendors that the rely on (eg. GPUs or electricity for their offices) can't be made pollution free with a flip of a switch.