Nobody will really know but I went to the niner game at BOA last time they were here and it wasn't 20% then. More like 10 or less. And a lot more opportunities for rival fans to buy tickets in the regular season back then.
I don't see niners making up more than 1 out of 10 fans on Sunday.
My estimate is 6-8 % (appx 5000 misled fans)
dropping to 0.26% around the end of the 3rd quarter
You're misguided if you think 49ers fans would rather be at a regular season game than a playoff game. It's all that the fanbase lives for. We've been spoiled for most of our lives with playoff appearances.
Oh, and don't forget how rich a lot of 49ers fans are. Those fools have tons of disposable cash.
In all honestly, there shouldn't be more than 2-3% for any away team in a playoff game.