You're off by a decimal there, bud.
It's actually up to 0.8%/week, but, in your example, that would only be $80,000/week.
There is no appreciable boost to pax being in an Alliance. I would say that there's absolutely none if you asked me, but supposedly there's a "very small" one.
The deterrent to competitors is worth more than anything else. If you're one of 7 airlines in an airport and 6 of them are in Alliances, you're almost certainly going to be the first target that everyone goes after because there's no worry about other airlines "coming after them" if they start targeting all your routes.