So, I get the sense of professional duty and the wish not to be out-competed by people who aren't playing by the rules.
But like others have said, maybe mind your own business. Keep your own nose clean, do your own work, and if anyone offers to help you cheat, make it clear to them that you aren't interested and move on with your life.
I truly don't care how others get their work done. Like others have said, the boards will sort them out, and so will the wards, for that matter. There is no cheating in real life and your attendings will know the difference. I do run into problems where people will invite me to participate in things that I'm not comfortable with, like exchanging answers for online quizzes or whatever. Even when they are makework nonsense, I really prefer to muddle through them on my own and not have anyone provide shortcuts / question banks / whatever. I also pay for the medical education materials that I use, including paying for my own subscriptions to Sketchy, Pathoma, whatevs. Someone has to pay Online Med Ed so that they can afford to keep making the awesome videos for us all. I could run around tattling on all the people who are pirating the materials, but seriously, who would that help? This isn't kindergarten. These folks aren't missing an opportunity to learn to be better. If they are this amoral now, telling on them isn't going to fix them. It isn't going to weed them out. No one will give you a prize for doing your civic duty.
At some point, you have to draw a line where you decide that you are going to do what is right, even if it means that you shoulder an unfair share of the burden and face greater risks than people who are doing the wrong thing. If doing the right thing were the easier, cheaper, faster thing, then everyone would be doing it and it wouldn't be a virtue. You have to decide to do it even though others won't and will get away with it and have some unfair advantages in the short term.
You still win in the long term. Your integrity will shine through, and you will get to be the kind of person who didn't cheat and didn't steal and still got through the super hard med school adventure. They will have to live with being the kind of people whose morals stopped mattering to them when they became a little inconvenient.