While most of the time, the "free CSGO skins" is just a lie - in this case it isn't.
You can really get a lot of skins, without paying a single cent for.
How ?
The answer is pretty simple. Surveys, small games, raffles ... well you all know and prolly hate that sites.
Where ?
If you use real informations and don't try to do same offers more then once, you most likely will get paid.
But that does'nt count for all payment walls. So I recommend to make a screenshot of the score, in case it's a game. If it's surveys or raffles, just keep the confirmation mail. If you did'nt get your reward within 1-2 hours, just write a mail to their support and send them the screenshots. It's a bit annoying to do and keep an overview.
But hey, we are talking about free stuff, so there's no point in complaining. It's really not much work to do.
In most cases you will be rewarded and if you don't expect to get 3 knives a day, you will be happy with.
The site itself get's at least once a day 100 + new skins around 6 o clock pm (CET) You should be fast, if you want some because so do others.
The early bird gets the worm!