It's relevant, because the standard of evidence would be much higher if it's a criminal trial vs. if it's a commission deciding whether or not to hand out a fine, where they have sole authority to do so. Meta could still maintain that it has done nothing wrong, in which case the article is right (and correct) to use the word 'alleged', since that's not been disproven. If they'd said 'guilty', they could open themselves up to legal trouble. I know nothing about the facts of this situation, to be clear.