Games4Ever71:
Apparently it isn't the offers I did, it was just the site is blocking me. I am on IE11, and still does it, and on Chrome and all the other browsers. I am completely unable to load the game window. That is after a full fresh install of Windows.
Ok who cares if you have invited friends to get free balls, I don't, it benefits WGT whether they are real or not so WGT likely does not care, now they give callys for this, if they gave a hoot, I'm pretty certain they would stop the offer.
But lets get you running again.
Are you sure you did a full reformat?, completely wiped the system and started fresh, a clean re-install? Stuff can be left over from a reinstall, you need do a clean reinstall, usually from a boot-able drive where you format the c drive etc. It makes no sense that you would be able to log in to the forums etc and not the game client. Something is definitely corrupted on your end, otherwise you would be blocked from everywhere on the site.
CCCleaner it's free, also try firefox, it has a clear all option and restart.
You can also try and log directly into the game client. http://www.wgt.com/gameclient.aspx