> Is Apple a co-conspirator then
Probably not? Is doing something that is likely aiding in a crime, but that you don't know for certain is, enough to make you a co-conspirator? Does it change if you do it frequently enough that you're sure you've aided in a crime a fair number of times? I think not, but I'm not sure what the relevant legal standards are.
> What about the people who did app review
Even less likely than Apple, and even if it's technically illegal it would be a good exercise of prosecutorial discretion to not charge them.