Cheater/hacker on pokerstars?

Has there ever been instances of players that have successfully hacked pokerstars in some way? Either that or using some kind of bot to cheat? I have played a lot of hu zoom pko mtts the past year and have run into a crazy player there a lot. Like jamming 50-150bb pre with a lot of trash hands at a high frequency often to collect minimum or very small bounties at all stages of the mtt. Like insanely -EV plays. I understand the value of bounties but we are talking often mid-late stages 3b jam and/or open jamming 30-100bbs effective with almost any two cards to collect a min/small bounty risking a 10-40x starting stack for example. Often times i also have him covered but still goes all in with trash for a ton of bbs. He often uses both his re-entries also. Looked him up on sharscope and his first 1700games he had been slightly loosing/break even playing micro stakes from 2010-2020 ending up at -500 dollars. Then one day boom he moves up to 15 dollar abi with 48% roi just crushing only playing these hu zoom mtts at night. Making 65 000 dollars in the last 2500 games. Have already contacted stars about it will be interesting to see what they find out. Any thoughts? I am open to being wrong here but seems super strange to me.