First, if any of you are still playing StreetKart, and still using MyStreetKart.club, please see this post.
Second, I just realized the sites have been hacked such that popup ads and redirects to other sites are occurring. So far, it seems to only be active for anonymous users. After I got logged in, I didn't see the hacked behavior anymore. Let me know if any of you are experiencing it while logged in.
I will try to get this fixed as soon as possible, but it probably won't happen until the weekend of 10 Oct.
Sorry for the inconvenience.