I just don't have enough time in the day. Sometimes I get on a roll & can crank out one per day for a week or so, but it's so easy to get burned out on freesites too that I have to take a break or things get stale. I wish I had the time & discipline to do that
I do have some submitters that do seem to have it down, though. One every day, pretty much no fail. I gotta admire that!