Note that I've used each polyhack for several hours across three different accounts. I haven't gotten banned and I've played a total of 12 competitive games (six on my two alts) since the release of bloodhound. The difference between myself and others is that I don't use programs like VMProtect or hashchangers. However, I'm not sure whether or not my laziness has resulted in me actually avoiding a ban considering I know nothing about these bullshit "hide my ass" programs. Regardless, I haven't gotten banned yet and I don't think I'm going to.
tl;dr - I don't use VMProtect and I'm not banned.