That's not entirely true...
Gigavps cratered.
Not any worse than S.Dice did, and both the above mentioned and S.Dice were on MPEx.
How long was S.Dice listed? How much did everyone lose that bought in at 0.0035+? Why did those people lose? (hint, management seemed to have gone on a 3 month post-IPO vacation...)
I don't think any exchange is immune unless the exchange only lists their own stuff. Which seems to be where MPEx is now?
MPEx has a lot going for it, but the batting average is probably not it.
Add: That trilema post you linked is hilarious! Reminds me of that old game "lemmings".