Never saw a dime? That’s actionable, I would think.
What a disgrace that rotten company is.
I did the reviews out of love for books anyway, so any money would have been "gravy'
And on my little store there, The situation was similar, the fees ate up the money from sales before I qualified for the $100 minimum check amount. I was doing a couple of thousand a month of the same stuff on eBay at the time, so the Amazon store was just an attempt at expansion... and what I was selling, I'll admit was not a good fit with what people generally thought of when they went to Amazon.
It was all a pittance anyway, so I just wrote it off as gained experience, not worth fighting over.