LLMs are just text autocomplete. Video and image generators are just a photo labeler glued to an image denoiser.

They are built from simple parts that do specific types of things. When you see that you can see where the scam is.

Yep. Don't remember if you can fully play it without the original TTD but there are open source GFX packs.

Yep! Minecraft and Factorio mods especially add insane amounts of depth that easily multiply the potential playtime by hundreds.

All options are possible. Sometimes an expression is fully new, sometimes it's first based on a mix of ARKit blendshapes and then modified, and sometimes it's just the ARKit shapes combined.