Not to mention they paid back a huge(like actually huge) loan within 2 months. Even at 100/100, paying back 10B in two months is ridiculous even if they were making 200M a day at 100/100 taxes, they will need atleast 50 days to generate the 10B with around another week or two to pay off interest.
But within 2 months, they not only paid back that amount, they also rebuilt everyone, got everyone huge warchests, got people cities and were selling off excess warchest.
The math doesnt add up at all. They would need to be making in excess of a billion a day to be able to do something like that.