I don't want to comment personally on the economic aspect, but I can refer to the economic and financial analysis research institute report that I mentioned earlier. According to that institute's research, they will not be profitable.
Scientifically speaking, there are other criteria, such as the amount of energy needed to do this landfill work and the potential landfill sites.
Currently, very little relevant work has been done in this area. For the past three or four years, I've been scouring scientific literature for information on the subject. I realized that 85% of all the papers produced were done by people funded by oil companies for the purpose of increasing oil production.
Therefore, nothing leads us to believe that burying CO2 underground carries no risks. The problem is, the risks have not been assessed.