Googles a powerful thing, one search and you find what you need, information on what risks are and arn't. Your numbers are backwards. more like 80% have figured out that material wallhacks won't get you vac'd and 20% still download sketchy hacks that get them vac'd and cause them to have to buy css over and over, this is why you see so many good player's with 40m+ id's . Im guessing that the server owners most likely use materials also, this is why they allow them on their servers where as a place like TRP doesn't.