That's true. Some more could have been dumped, I'm sure Burnside has more pressing issues that to monitor Labcoin's stash.
Well, now they likely have to dump below IPO price, while setting up a transit could net them at least 2x. There should be exchange operators that are more than happy to accept them. They didn't get any heads-up to this event so they can't possibly be the majority of dumpers. Furthermore there have only been far less than 1m shares dumped so far, and it's already IPO price. burnside will be very busy, and I hope TheSwede75 would at least help a little bit.