Talk:Tower Shields/@comment-85.243.88.245-20191110162026/@comment-103.199.94.222-20191126163956

@ GyEknowItAll

(cont)

If you don't believe me, check the Berber changelog - https://ageofempires.fandom.com/wiki/Berbers

Relevant excerpt - Initially, Kasbah increases not only the team Castles' working speed by 25%, but also the Castles of the researching player by another +25% (resulting in a total +56.25% bonus). With patch 4.8, Kasbah only affects the researching player's Castles once.

This was because there were two multipliers, one for the whole team and one for self. It mean't 1 (base Castle 'workrate') x 1.25 = 1.25 and then again 1.25 x 1.25 = 1.5625. If bonuses with a flat multiplier worked additively as you think, it should have been only +50% instead of +56.25%.