Sorry for being pedantic, but the only confirmed information in that article is "payment processors". The author seems to just assume that this means credit card companies (what is a reasonable assumption, as said), but it does not sound like that part is confirmed...
soulsource
This article has a screenshot listing some removed titles (and I think also a link to the original source): https://www.gamingonlinux.com/2025/07/valve-gets-pressured-by-payment-processors-with-a-new-rule-for-game-devs-and-various-adult-games-removed/
If you count DOSBox as emulation (what it definitely is - unlike WINE it actually emulates an x86 PC and peripherals):
- The Settlers 2: This is a timeless classic. The graphics are 2D, but they still look OK today.
- Albion: A Science Fiction and Fantasy RPG (yes, it has both, and that'a a key point of the story). The gameplay itself isn't that great, but the lore, story and the graphics are amazing.
I've played both on the Deck, and they both work great. (Btw: I did not use Settlers 2 as an example for my DOSBox setup guide by chance. I picked it because it is an amazing game and still fun nowadays.)
In Physics we mostly used right-hand, but X-right, Y-up, and Z pointing towards the viewer.
But that's details. The only important choice is between left- and right-handed, as that affects the signs in the cross product (and some other formulas - generally everything that cares about which rotation is considered positive).
Near-Mage. It's a point-and-click adventure from the same studio that also made Gibbous, and set in the same world. However, the theme is much lighter. Gibbous was (while still a comedy) about cosmic horror. Near-Mage is fantasy.
While I definitely recommend the game, it is lacking a bit when it comes to riddles. Most point-and-click adventure games have lots of them, where you need to think, give up, and then just try random stuff until something happens. This is almost completely missing in Near-Mage... There is almost always a quest goal that directly tells you what to do - up to the point that situations that give you a choice are explicitly marked as such.
On the other hand, just like Gibbous, the game is beautifully drawn and animated, and all dialogues are fully voiced. The characters are likeable and - call me a furry if you want - really cute. What keeps me playing is mostly the world - there is always new stuff to discover, even in late-game, and the mix of fantasy and (what I assume to be) Romanian folklore is great.
Two things to add regarding question 1:
The Steam Deck GPU is optimized for the built-in screen, which has 1280x800 pixels. FullHD is more than twice the number of pixels. The GPUs fragment fill rate will therefore not be sufficient to play many games at FullHD native. The Steam Deck has built-in FSR upscaling though, so if you are not sitting directly in front of the screen, it will look OK-ish...
The second thing is refresh rate. On the deck itself you can set the screen refresh rate to 40 Hz. For many, many games the built-in GPU will not manage 60 FPS even at 1280x800, but it quite often manages to do 40, which still feels OK-ish.
Most external screens don't support 40Hz though, so you will be stuck with either limiting your framerate to 30 FPS, or you will have to live with either tearing or unsteady framerate.
I now have run into the issue that I myself cannot play Minecraft on my Linux laptop, which is an ARM machine and the ARM Mali GPU does not support the OpenGL version that Minecraft requires. (It also needs some hackery, as the Java-written Minecraft uses some native code libraries.)
I'm now playing VoxeLibre instead, which runs mostly fine on my laptop.
They only mention "payment processors", not Visa, MasterCard, PayPal,... So, this does not answer which payment processor(s) are behind the push.