Eh, I don't know why I thought it's 1M for the cup. Obviously it's 300k, yes, and BBB is 1M :) Ok, so the championship is worth more...nice to know this!
Btw, what is so appealing in winning the championship in D.1 except for B3 berth? You get a 1M for winning the cup and you are also eligible for B3, so what's the point in winning the championship except having style points?