lol, i enjoy the comments.
no bong smoking roommate.
the model doesn't account for any injuries whatsoever. the ratings are based purely on scores of previous games. they can serve as a starting point in a "if each team plays exactly as they have to-date" sense. if there are injuries you must decide how much to adjust.
initially, the model was developed not for predicting games at all. it was purely to measure teams on-field performance (much like the Sagarin Ratings do...except unlike his model, all teams start with a 0 at the beginning of the season in mine). only later did i observe that it does a good job of predicting.
i'm not trying to make money doing this to be honest. i just really enjoy it and know that there are people who like getting other views of what they've seen, so i share them.
as for what predictor models i use,...it's something i came up with myself.
good luck to everyone.