Seattle are still the public darling while the Bengals have still something to prove in Joe Public's mind. Oddsmakers open lines at numbers where they believe can generate 50/50 action. If the action isn't 50/50, the lines move towards the discrepancy. Algorithms take care of that at big oddsmakers like offshores.
I know you believe that there are games which have loopsided money splits but unless you can prove me that, I won't believe it. Why should a big bookie (not a local though) take so much risk by accepting a 80/20 money split on a spread? One late pick six and he gets burned.
As long as so many people in the world are betting so much money day in day out, bookies win on every game off the juice, so why would they take loopsided action?? And if they take loopsided action, why do lines move so often? That wouldn't make sense.
On Sundays you can follow line movement going crazy on NFL games two hours before kickoff because there is much money coming in on the games. If games are rigged or bookies know who wins, they don't need to move the lines do they?
Thanks for your comment, wish you the best this week