This is not entirely true. If a bonus is NLTBE it would not count against the cap, therefore would not help the team get to their cap #.
Put in layman’s term for you by Wikipedia (sorry but it is easy to read in this format) –A team’s salary cap is adjusted downward for NLTBE bonuses that were earned in the previous year but not counted against that year’s cap. It is adjusted upward for LTBE bonuses that were not earned in the previous year but were counted against that year’s cap.
To my knowledge, bonuses such as this "punts blocked" are prohibited if not expressed on page 99 of new CBA as stated in the Incentives section of salary page 97 line vii