I do not know where you took the number 200.
Seems to me that the sum is much smaller. I am too lazy and I do not have any reason to calculate their spending.
May be is was 200, but a big part of this sum went to fees while splitting to dust.
The problem was that the amount of bitcoins were already split to a small outputs - too late for SIGOPS-attack.
I do not have any information about future spam-attacks.
I do not know people who want to waste their bitcoins for a next "stress-tests"