Because I am a curious bitch, I looked this up (not the fact that they can live after being removed from the ocean; I totally believed they could do that). I was more curious about what happens once they're vacuum sealed.

Wikipedia yielded the fact that oysters can live for up to four weeks after being harvested, as long as they are kept in the proper conditions.

But vacuum sealing and freezing them appears to be for later cooking, and not consuming them raw. Dead oysters are apparently not safe to eat raw.

So I think, in this particular case, the "raw" is meant to indicate "not cooked" rather than "to be eaten raw," which is how I incorrectly interpreted it.