I just threw that as a hypothetical for giving a separate bonus for 3-starring the base, but after considering how players tend to attack down, it really should require 3-star attacks to bump the multiplier up. 2-star attacks should keep the bonus multiplier at whatever the current level is, but to move up to the next one should really need the full 100%. It is insanely easy to get 2 stars on bases a TH below yours with just a low tier farming army and maybe a spell.

