CORR is the only fair metric on which you can base the payout at the moment. I say fair because you can train a model on it and get paid accordingly.
TC is useful for the fund, but it is unfair for the users because you cannot train a model on that metrics and, more importantly, TC doesn’t express how much a model is useful to the fund, instead it indicates the CHANGE of a model usefulness. The payout should be a function of a model usefulness, not the first derivative of it. I have already said it in here…
That’s why I hope they never get rid of CORR payout, unless they fund another fair payout scheme.