The only stinker is that they are experiencing technical difficulties due to the volume of traffic.
So if you want to give it a shot, you can head over here and try to enter the sweeps and at the end you will get a confirmation that your coupon is on the way.
Please note you might need to just come back later because the site is down as of posting. Also please note if you are on a mobile device you probably won’t be able to see the entry form.
If you are on a mobile device, you can try starting here see if you can get through.