I have a non-IDN domain getting significant traffic, 99% of it from within China.
I switched it out of Dynadot for about 4 days, so it was using dynadot DNS to forward to a casino program, got shitty results so switched back to fastpark DNS.
It's now getting over twice as many visitors per day and same goes for revenue (covering reg fee on a daily basis).
Might be worth trying on some other names?