Regarding disgust. You are right about that being a shaky assertion, I dont think something like that can actually be proven accurately.

I dont think that everything has to have an evolutionary function. I provided an evolutionary explanation to stay on topic with the original article. An evolutionary approach is just one lens to view an issue through - a limited lens at that.

There could be a genetic explanation to explain the behavior - it's possible. I dont think we know yet, maybe one day we will?

The payment of articles fluctuates depending on how many votes it receives and by whom as well as the price of STEEM and SBD. The price of the tokens has gone down in the past year or so but that doesn't mean it wont go back up again. That's not something that can't be predicted. Not by me at least.