Max power is 364 or so (limited by max activity in a year).
If I bump several threads within 30 days my bump power will go to 0, but I will still "give" 10 points to bump score for 1 post in thread every 7 days.
It will not go down to zero. It's reduced by 15% from the previous value, not by 15% from the original value, so something like this: 100% -> 85% -> 72% etc.
Those mini-bump points are exactly the same as the super-bump points so yes.
This new strategy does not exactly fill me with confidence - unless I am missing something from the OP
Only users who earned merits in the last year can bump and their bump power is proportional to the amount of earned merits and it's not unlimited. That's a HUGE difference from what we had before when any newbie could bump by posting any nonsense any number of times.