@Kolyo,
The overall winner is the player who ends the season with the best winning percentage after 17 weeks. We do give a nod to the player who does the best each week.
We expect that players will participate by posting their picks in all of the games. But over the years I have realized that folks may not be able to that. They may leave off a game or may have to miss an entire week. There is no penalty when that happens and there is no need to provide an explanation for their absence. At some point, though, I decree that there must be a minimum number of games picked in order to be in the running for the best winning percentage for the season. I guess I would also take action if I saw a player display a pattern of deliberately skipping games.
I usually post the schedule for the week on Sundays. I encourage players to post their picks early in the week. It makes my job a LOT easier. Players may change their selections but final choices for ALL of the games are due by the kickoff of the FIRST game. Typically that is on Thursday night at around 8pm ET. We are pretty strict about that.
I hope that I have answered your questions about how things work. I am certainly open to any suggestions.
We look forward to your participation, Kolyo.