Interesting, I just bought Mort calciworms (we don't get Phoenix worms in the UK but I read they're almost the same thing?) and she just has no interest. Tried a few times and she had two from a bowl the first time then ignored them, had one from my hand the second time, but really uninterested. I also found one pretty completely intact in her poop the 3rd day (everything else fine, poop-wise) so I'm guessing she doesn't like them and they just didn't agree with her.
Luckily I only bought 100 so no big loss! I really would like to know the best way to dispose of them without them hatching though - since they're non-native here. Or if feeding to birds would be ok.