Already is for most of us, just a label on a poll right now. Pond5 isn't photo it's mostly video. It's big three and anything else. People left DP in droves, they still have rank from the ones who stayed. It's not a rating by earnings, it's a rating by people who stayed because they are doing better then most of us would. DT is the same. Many people left, they don't vote, the poll only shows the last who were making money.
If everybody woted what we make at every site, top ten, whether we had no photos or 20,000 the poll would show what people really make. Start averaging in the no money and things would change very fast on the poll. Now it counts happy people, not real earnings.