This is not my first experience with this type of thing.
I don't leave NFB, but for about 1% of my purchases I do leave low DSRs.
I mean........... if you sell to me you are pretty much guaranteed PFB and 4 5 Star Ratings.
You really have to mess up to get anything less.
Recently I purchased an item and it arrived smashed.
The seller forced me to return it before he'd refund and then claimed it didn't arrive and I had to escalate the case.
I just left PFB with a comment that it arrived broken and I had to return it prior to a refund.
I left 3 low DSRs and a high DSR for Shipping time.
That FB was removed quicker than you can blink.
There was no time for anyone to review it.
It was an automatic computer driven removal.
Odd.............