No one should be buying crappy leds like that anymore. And if they are spending the cash for high rpm fans, then a hub would be a logical choice, or a powered splitter. Even then it's not an issue. You don't need to run them at max speed ever, so it won't be an issue.
Clearly the op put what fans they want, which won't hit that speed and the leds are separate. So, there isn't and will never be an issue.