That was dumb.

Each of those URLs creates its own set of cookies, so people found they were in a new account with zero balance and emailed me.

Here's a better idea:

Use https://just-dice.com instead.

It is now set up to pick one of the 6 load balancers at random and so should hopefully get you into the site.  If not, pick a name from www0.just-dice.com to www5.just-dice.com, but be prepared to have to log in to get to your usual account.