Amongus.io is an interesting twist on the "Among Us" concept, incorporating elements of population growth and competition. The idea of collecting food to increase your population and using it to challenge other players adds a strategic element to the gameplay.
From what you've described, it appears that "Among IO" might be a unique variation within the ".io" game genre. Combining the familiar characters from "Among Us" with gameplay mechanics involving population growth and competition could create an engaging and entertaining experience for players.
As with any game, it's important to try it out for yourself to get a true sense of how the mechanics work and how enjoyable the gameplay is.