I never bet when the count is less than -2,not even minimum. It's true that sometimes you'll get lucky,but luck can run both ways. A dealer can bust a lot or get many consecutive 20's and 21's. If you're going to only rely on the luck game,then win and leave immediately. Most likely your luck will run out earlier than you expected.
It has been difficult getting the high counts lately. It takes at least 1 hour before I find a hot table. I wish I had a team of 4 or 5 people,like those MIT students.hehe.

