Many times, accounts will down vote plagiarists and abusers to keep them away from the reward pool until they are able to behave in a way that benefits the ecosystem.

Look at these accounts for example:

@mujaffa103 (and all its copies)
@gaapx07526604
@leo165
@hyhy448 (and all its copies)

Are examples of abusers

It's in the best interest of any stakeholder to look after their investment, whether large, medium or small.