There were actual crimes but it was essentially the Russian government hacking email campaigns related to Hillary Clinton and drip-feeding them to the press. On the ad side there's none that I'm aware of.
A jury just found that there were more than 43 million crimes (total) committed on the ad side. I think you're saying that the illegal data collection wasn't related to the advertising end, but it was. That's why they did it. Whether it was actually useful or not is irrelevant.
More importantly to me, the billionaires using it to launder their bribes to the US president probably won't ever be convicted, but that does not mean they aren't just low class crooks who can afford good lawyers.