It's just random scenes from an episode. Easy, I assume everyone to get immediately. Medium, most will get bit it may take a moment. Hard, you'll get it once you figure it out, but you might not figure it out. Genius at work, I doubt you'll get it, although I'm often amazed at the speed at which people get it.

In terms of posting, the subreddit is empty so I post. If everyone stops responding or I get downvotes I'll stop. (Or if I just get bored)

I find them fun - it's fairly common that you remember the scene/joke, but it's such a non-sequitur that placing it in an episode isn't always obvious.

Also the points are made up and don't matter.