Back in MacHeist 1 I wasn't subscribed to the RSS feed and I missed a code or two. I always thought that "expiring" the old heists kind of spoiled the fun a bit. I'm subscribed to the RSS feed now, so hopefully I won't be missing anything
If it is not a big deal, maybe in MacHeist 3 the developers can leave the old missions listed for those of us who still want to (re-)play through them, even if there is no longer any loot code available.
Just a though!