Trust me, I agree. I just found the first link that explained it more or less. I am the furthest thing from vegan and I couldn't care less, but wanted to produce some source on why Impossible Meat is not technically vegan certified. Whatever that is.
I'm not aware of any standard of vegan certification. If there was one, and it counted this against Impossible, then it would have to count a whole lot of other ingredients that were animal tested too wouldn't it?