I get what you mean. But I think, if you play well enough, place your worms well enough, then plopping your own worms becomes absolutely senseless and tactically suicidal, it's like killing your own worm at Elite, very very rarely it comes handy...
By the way, I did watch the replay, take a look, at the end, it comes down to simple Hysteria, so I doubt it gave the winners any advantage overally speaking.
This is like the early days of "telecow".

Soon all the beginners will start speaking about "plopcow".