Late at night is probably a good idea, or early mornings, but also watch for news updates and wait for a round of bans for RMT/illicit activity and then make one. Our server hovers around max capacity and the RMT fill up the last bit of the capacity I guess. I've heard about it a few times from a few different friends, tried messing with an alt character creation a few times, can confirm. Wait for a ban wave most likely. You see em every other week or so I think~ but keep trying in off-peak hours while you're at it!