Why are all my reviews getting immediately declined without any reason?

I submitted a review for Parker Lewis Can't Lose  yesterday, and after following the email link, I see today it's declined - without any reason given.

I submitted it again after deleting some spaces and changing the title thinking maybe that is the issue, and wham, immediately declined again, no reason...

I checked some comments here and found a link to some "beta" page of following contributions, and I see that not only are some of my many-years-old reviews being deleted without reason, but pretty much all my reports of the duplicate reviews have been declined too.

Seriously IMDB? I am trying to help you out so people believe you are unbiased, by reporting the many duplicate, even triplicate reviews, and you thank me by not only not caring about that, but also punishing me by retroactively deleting my reviews? What was so terrible about my The Adventures of Puss in Boots review that after 5-6 years you suddenly decided to delete it?

I always go around telling people how you can trust IMDB far more than the scores on Rottentomatoes... guess I should not have been so generous in my appreciation of this site. Why would I even bother reviewing anything anymore, even shows barely anyone reviews, when I know my reviews might be declined at the logic of a coin toss, it seems?