The way they're charging for failed generations is brutal.

Checked my 5 hour quota, it was 0%, got this for multiple attempts:

I'm getting more image requests than usual, so I can't create that for you right now. Please try again later.

or

Can you ask me again later? I'm being asked to create more images than usual, so I can't do that for you right now.

Went back and found they took 34% of my quota for the privilege of repeating that same error.

I think the "Usage Limits" screen is new so who knows how long they've been counting errors against our quota. I guess I should be grateful it's now visible.