Case Hack

Hi guys
I've seen a lot of people having +100 cases or a lot of skins from the same collection
I've also seen a lot of sites that says there is a case opening hack that lets you open any case you want for free
I've searched a lot but failed (fake or ****** protected)
Please help me find one it's so useful
Thanks

altho you may have camo hacks in offline mode, other then that the reason why people has so many is because either they bought them or scammed
or got it in a fair trade of a high worth weapon e.g. awp asiimov