As Garnet said, they're basically just a currency used on Steam. Generally, a CSGO key is equivalent to $2 USD in market value (market value is what games are worth to trade and resell, and NOT their retail cost on Steam, etc.). You can trade these CSGO keys around to other people as if they're currency, because ultimately they can be resold directly on Steam in the Steam Market for roughly $2.35 after fees. That $2.35 goes directly in to your Steam Wallet.
So we're not talking about the game key and we're instead talking about crate keys right? Like: "Spectrum 2 Case Key"
Exactly. CSGO Key, TF2 Key, Case Key, Tour of Duty, Gems - all terms for types of commonly used currency for bartering. Game redemption codes themselves are also referred to as (Steam) keys, but typically it's made obvious what's being discussed.
Snake Pass + Black the Fall + any thing from this link https://www.steamtrades.com/trade/3IeDE/h-hb-monthysnake-passparadox-hb-w-offer-keys-pp for 1 key ?
Hmmm. I'll think about it...it would probably have to be at least two more games from the list though since these are so cheap right now.
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