Hi all guys! Just an opinion...anyone of you have ever heard about this kind of earning system? Is it reliable? Any issues?

The FBI will come to your home and ask what your ties to Kim are.

G2A is an unauthorized reseller. They sell stolen products, review copies fraudulently obtained, humble keys, and even games from free promos.

Their program probably involves spamming an affiliate link around among other things. If you want to profit online there are better ways than supporting things that undermine the gaming industry.

Really? A lot of people speak about it as a good marketplace...there is also a way to donate money for beneficence..
I'm surprised.. I was really convinced that it was an authorized reseller!

Tried it once never going to do that shit again.
If you want something like G2A goldmine then try Gamers Republic instead.
That website is legit from people who brought up Anomaly series.

Hey,
I don't know about the G2A Goldmine but if you think about buying games from this site you should read this first:

Firek:
"Unfortunately these codes were among those that we recently discovered to have been purchased fraudulently. We have canceled the codes and, most importantly, issued refunds to the owners of the stolen cards.
I would strongly suggest that you contact whomever you purchased these codes from, and demand a full refund.
I apologize for any inconvenience caused.

On a side note, it's worth pointing out that selling GOG gift codes is forbidden as per our User Agreement (3.3) so these should never have been put on sale anyway."

Source: https://www.gog.com/forum/general/3_games_disappeared/post15

This, see people try it regularly on the Steam forums. Referral link spam is the devil

Not to mention giving money to any youtubers to have a referral link in their video. NEVER buy GOG codes from them and never buy without their G2A shield thing but its shady even then since keys can be withdrawn after being redeemed. But most of all don't use the goldmine thing. They get proceeds from that and there no telling what kind of shady people do the thing.