There's nothing specifically illegal about buying/selling keys there, but almost all the keys are obtained via illegitimate means, in ways the developer or publisher didn't intend.
Can you get scammed from G2A?
Is G2A legal and are G2A keys legit? Yes, G2A is completely legal and reliable. G2A is an online marketplace where you can purchase Steam keys and other store keys for various video games.
Is buying Steam keys legit?
Their keys come from bundles, giveaways, they can be gifts etc. These codes, like all codes, were generated by developers and publishers, so they are legit.
Is G2A Steam keys legit Reddit?
G2A is a site where individual sellers can list their game keys. G2A by itself is legal, but where the sellers get their keys from can be a bit sketchy. Also don't buy the mystery packs of game keys, they are all cheap bad games that they pick up for pennies.
Is G2A trustworthy 2021?
The G2A website claims that the keys sold are 100% legit, but if you do a little research, you can find instances where people bought a key that didn't work. Overall, G2A.com seems to be a secure website and free of viruses.
Are random Steam keys safe?
The short answer is no, it really isn't worth it to gamble with these keys. Most vendors will give you really bad games, and even lie to your face that you can get games like GTA, Rust or CoD for as little as $2.