Originally Posted by
Lysah
Because the fact that your team has to continually pay for true sight just to leave the base is a testament to the power of MLS. Even if she never uses it to change a team fight definitively, the fact that she forced you to waste gold is already a win. If this were a hero like SA or Clinkz I might agree, but PotM also has a fantastic escape, a solid AoE nuke, and a stun, so her invisibility is not a liability, only a strength.
Not to mention that she can save allies from ganks whenever she is level 6, unless you want to buy dust for all 5 members of her team just because she exists. Again, that's money you are spending that she is not.