You're conflating grey market key re-sellers (G2A, Kinguin, CDKeys, etc.) with actual legitimate key sellers (GreenManGaming, Fanatical, GamesPlanet, etc.).

Just because the names of what they do sound alike doesn't mean they are alike. As has been pointed out in other comments, either use isthereanydeal.com or gg.deals with the "Keyshops: Disabled" option, and any shop listed will be fine.

doesn't look that way though.

That's exactly what it is, though. It's satire, and tells you as much right in the first paragraph of the "About" page:

Hard Drive is a very real video games news site that you should not question. Just absorb the information as truth and move on. JK it’s satire don’t ban us.

All them uppity French peasants?

If they started with that proposal 2 weeks ago, there would be no drama at all.

Agreed, but now they've kicked this hornet's nest, they're going to need to go back further than their starting point to make up for it.

They're still doing it, albeit in a slightly pared back fashion.

Not really good enough, honestly. Backpedal further, guys, you're almost there.

It's not like it's never happened to paid full games before.

*cries in Battleborn*

Plane must have accidentally ran into a surface-to-air missile. Y'know, as you do.

Literal rent-seeking. Bunch of filthy leeches.

Now maybe fix the AI pathing to keep your idiot party members from stepping on already-discovered traps?

For 99+% of the Switch's target demographic, there aren't options.

They have never heard of the Deck, the Ally, or any of the other handheld PCs. They know three things about gaming: Nintendo, PlayStation, and Xbox. Those last two don't let them play Mario, Zelda, or Smash Bros., and they certainly don't let them play on the go, so they essentially only have one option.

I love my Deck and I hope to see the handheld PC market continue to grow and evolve, but it's just delusional to think that it will ever get to a point where it will have even the slightest impact on the third-best-selling console of all time (or, more to the point, its successor).

There are actual authorized key seller sites out there (Green Man Gaming, Fanatical, GamesPlanet, AllYouPlay, IndieGala, Voidu, etc.), you just need to make sure they're not selling ill-gotten keys. Basically, if the price seems like it's too good to be true (as it always will on grey market keyshops like G2A, Kinguin, etc.), that's because it is too good to be true.

As others have mentioned, use https://isthereanydeal.com/ to find the best prices. They don't let illegitimate sites into their listings.