It seems genuine to me... as in there's no real money resting on it! Maybe you just tick it's algorithm boxes with your particular style of writing? It just seems to be an experiment in how to auto detect quality. The post explaining how it works is interesting reading.
But I'm not 100% myself either, so thanks for flagging it up.
Hehe perhaps it does just has a thing for my writing once a week. I never did flag it as it was a nice little thing for anyone who came down to my comment section to see and think “that comment is right.” I'll take the free help.