The satellites are already in orbit, so using what is already there isn't spending a lot of money.
We have a budget problem. We need to cut redundant efforts or we will have an even bigger budget problem later. I did a bit of searching the web and found that there's about a half dozen CO2 measuring satellites that will share data publicly, then another half dozen that keeps the data to themselves. While this may be "not a lot of money" in a very large federal budget it is still money spent that could be used elsewhere.
The OCO-2 mission has apparently had it's mission extended at least once already, there's simply people at NASA that want to extend it further. They claim the data OCO-2 provides is somehow unique and vital to varied national organizations but I'm not seeing it. Japan has GOSAT-1, GOSAT-2, and soon GOSAT-3. France has MicroCarb. NASA/JPL has OCO-3 and Aqua. Then there's more satellites operated by Canada, China, and others that don't share the data they collect publicly. Maybe China won't share what they have but Canada might. That's assuming there's some hole in the data from the half dozen satellite missions that share data to all.
We don't need this satellite. It's burning money that could be used elsewhere. It's original mission ended already, if the mission had not been extended then it would be at the bottom of the sea by now. This is people at NASA wanting to extend the mission longer, and using hyperbolic claims of wasted money and lost data if the mission on this satellite isn't extended further. It appears we learned just about all we can learn from this satellite so keeping it in orbit beyond the already budgeted mission into 2026 is wasted money. I don't much care if this is "not a lot of money" since if that is the excuse for keeping every redundant mission then we will only get deeper in debt.
Giving tax breaks to the very wealthy and corporations helps us in what way again?
Windmills. We get windmills by giving tax breaks to wealthy people. I thought everybody wanted more windmills. I want more windmills. Don't you want more windmills? This might free up "not a lot of money" for windmills but maybe we can keep looking around for more "not a lot of money" redundant programs to kill, then we might get a lot of money. We can try to give the tax breaks to poor people and the unincorporated for windmills but I suspect they lack the resources to make that happen, so we've been giving the wealthy and corporations money for windmills because they tend to be better at providing results.
You probably don't care about THAT nonsense that Trump keeps doing, but anything that helps people, including hurricane tracking is a waste of money for you, right?
OCO-2 doesn't track hurricanes. We have other satellites for that. This includes the ISS that can get a look of hurricane prone areas several times per day.
Did I mention that the original plan for OCO-2 was to have it on the sea floor by now? I'm having trouble finding how long they originally planned to keep it in orbit, only that the mission has been extended into 2026. Since OCO-2 was put in orbit we saw at least three more CO2 tracking systems put in orbit, OCO-3, GOSAT-2, and MicroCarb. MicroCarb is especially interesting because it is intended to be the replacement for OCO-2. So, unless something happens to MicroCarb between now and the current OCO-2 funding runs out we should de-orbit OCO-2 as planned so we aren't wasting money. Again, that is money we can give as tax breaks to wealthy people and corporations for windmills, because a lot of people want more windmills.