KEY's latest game (Rewrite) was a big flop. It should have sold more. http://visualnovelaer.wordpress.com/2011/08/25/rewrite-sold-24424-copies-what-on-earth/
The game came out in June 2011 to meddling sales. Some data copy and paste from blog:
1999 Kanon 156,046 (console figures included)
2000 Air 168,233 (console figures included)
2004 Clannad 100,560 (edit: console figures NOT included. my mistake)
2007 Little Busters 40,500 (consoles numbers about 90,000)
2008 Little Busters EX 36,836
2011 Rewrite 24,424 (wut?)