If you let your chances end up at 50%, you're doing something wrong somewhere. Because its not hard to make sales (research, good luck, action pts, etc), its just hard to get those bulk purchases that make you some mad cash. Unless I'm having a slow day, I won't touch any lead of six pills or less. The payoff even with a demo just isn't there, and I can spend that time doing other things like hooking-up with my rich boy toy (better sex with better payout).
Ok, now I think about it I might do a low pill count sale with the stripper pill since one can get cash tips during demo. Last time I think I pulled in almost like $700 with tips, but did get the crowd just a tad hotter then I like (think I had the group scene like five times before they let me go).