If your bump power is the same every day, that improvement does not change anything for bumping effects and prevent shill accounts bumping topics for their services.
theymos' explanation on bump power
b*[0.85^(s/b)]
I am fairly confident the above is the intention, but have no way of testing if it is implemented because I have superbumped threads in the past 30 days. If the 's/b' is an exponent, I can rule out the '0.15' from being the base because if someone has never superbumped any threads, the exponent will be zero, and the parenthesis would be simplified to '1-1', or zero, and if the 0.15 is multiplied by 's/b' the rolling 30 day cumulative superbump score (assuming 1 superbump per day) varies a lot for the first 90 days after the first 30 days of superbumping. Using an exponent to 0.85 results in the superbump power stabilizing within 60 days if someone superbumps one thread per day.
I have charted both the above exponent formula, and 0.15 being multiplied by s/b below:
b*[0.85^(s/b)]
0.15 being multiplied by 's/b':
I have also charted the individual superbump power if someone bumps one thread per day based on the exponent formula: