Just got a new mail with the latest 'offer' from SK. It contained a test to see if I'm a true traveler (no price to be won, no coupon, nothing really) and the promotion of their 'low fare calendar'. No real offers in this offer, despite the mail having the title 'our best prices to the whole world'...
ps. I didn't find Washington DC an unattractive destination. It was in fact one of the more fascinating cities I've visited in the USA.
pps. SFO wasn't part of this deal.