This is actually not a bad suggestion. Especially if they are going with the mini-DLC option (like I think they will) and they are planning on quarterly DLC (which the 1 in STK1 might imply) if they rolled out a season ticket plan to buy them in advance (full year at a discount) that would make the acronym make perfect sense.What if, and I only suggest this based on some of the questions in the survey, STK is an abbreviation for something like "Season Ticket."
Of course, I'll also lend support to SeanBean Totally Killed, and every DLC in the STK series has an intro/preview video where Sean Bean gets killed in new and glorious ways.