Thanks for the heads up everyone - I've identified the compromised file and updated it. We're still working to close up whatever hole is open. In the meantime I encourage everyone to to do whatever you can to stop your devices from actually visiting the coinhive website; this is a widespread internet problem and you will certainly encounter other sites sending traffic there.
There are already extensions for Chrome around as mentioned here:
https://thenextweb.com/apps/2017/09/...miner-blocker/
I haven't seen any mentions for Firefox or other browsers but they're probably out there.
In the future, if you find another page or domain of ours that is trying to reach the coinhive site,
please send us the URL by emailing webmaster@sjgames.com with the subject line "Found cryptocurrency hijack on SJG site". Thanks!