Yeah, Watergate by Clown Car.
The monetary considerations are minor, but what the first lawsuit led to was discovery and revelation of wrongdoings and the power of discovery is very great indeed. With it the DNC may worm its way into finding criminal acts that lie outside of Mueller's authority to investigate.
Hypothetically, if there were an intermediary buffer between Russia and Trump, Mueller could not breach that unless there's some evidence to investigate. It might, however, be possible for outside entity to discover a tie and Mueller use that.
I am not saying that it will nor that it's even likely but the DNC lawsuit was one of the first motivators to investigate Watergate even though most laughed at the DNC for trying to pull some crazy stunt.
It wasn't so crazy after all.