They're surprisingly easy!

When a puzzle is successful, when people solve it or when they don't?
I can't decide.

Q6 is by far the hardest, but just pay attention to the question. It's a snake queen although not solid, not liquid and certainly not made of metal. It's a delusion, a creation of my broken imagination.

Q7 is straight forward if you're used to purchasing bundles. Even if you're not, some searching around should clear this one.

Q8 is talking names.

Q11 is very easy ✋ ✋ ✋ ✋ to solve if you notice that it is related to #10. Didn't you notice!? HOW COULD YOU!?

It's not the full title of the bundle. The answer doesn't have the words "humble" or "bundle"

Q6 begins with "Salmissra". I guess the link between this question and the others was too subtle for solvers to make a connection.
Q10 and Q11 are easy as playing poker. If you have an ace-high hand, that is.

They aren't meant to be hard. The problem is that puzzle makers are biased so it's very often hard to make something fairly solvable, especially because to the puzzle maker, it appears to be a perfectly sound and easy to solve puzzle.

Click here if you are a ninja.

Nope, I'm still stuck on Q9 and Q10.

I'm stuck on Q10 too

Came back just in time to see the spoiler. No wonder people were having trouble with Q7, you forgot to include the word "Digital". D;

(assuming I can drop a hint like that considering you spoiled the puzzle anyway~)