I did about 5 a week (on the 5 a week plan), so about 20 a month. I actually watched them too. I work nights, so I'd come home around 6am, toss in a movie, then go to sleep. Got to the point where it took 3 or 4 business days AFTER I sent them out for them to receive them, then they took a day before they'd send out new ones. The dist. center is only an hour away, if I mail them today before 5pm they'll get them tomorrow morning.
So yeah, after having it for the past year and a half or so, I've run out of things that I care to watch. Cancelled it the other day, they got my last 5 today, I'm out.