Good morfnoevight all you Monday, Monday stoners. I am honored to count among you.
Their highest and best use is as a carbonated drink maker. When you drink the carbonated drink it releases the CO2 into the house to become available to your plants in a controlled manor that is likely to enhance the plants environment positively over time. Whereas a quick release of gas in a very short period could be useful in an air-tight room with increased DLS perfect RH and Temp control The little bit of gas in those cans is meaningless.
I live in a house with gas cooking and between that and us breathing the CO2 levels in our house was in the 480s range as measured in my tent while outdoor readings were around 430. We have a pretty big effect on CO2, the oven raises it 20 points or more in the winter when the house is closed up. Taking a shower raises humidity a lot for about 30 minutes at my house. I have had a Pulse One since invented. You can learn so much about your plants environment. It does cut two ways though because just knowing don't fix it.