Min bets to steal at bubble time?

[rydazzle]

I played against a pretty tight group when it went down to 4 handed last night (I had a pretty good lead), and I had excellent results just tossing in a min bet to open the pot on the flop (that I missed). On a few occasions it was a 300 bet into a 1050 pot ... super weak bet, but was working.

I realize I was lucky enough to be stealing against some weak tights, but in a tougher game can min bets steal or is the 1/2 pot bet required?