The number of users are likely including the 2.3M Salvadoran Americans living in the US.
Of course! They're talking about chivowallet in particular.
Guess it's pretty hard to say, but assuming only El Salvadorans are using @chivowallet, in the US and El Salvador, that changes the calculation to (6.83+2.3-2.73)*10^6 / (259200) = 24.691... days.
(6.83+2.3-2.73)*10^6 / (259200) = 24.691...