Since the skill level is mostly lower at Micro stakes, offensive strategy will be effective, the majority of semi bluffs will get through often enough to be profitable, and you'll find alot more players are willing to call 3-bet out of position and just give up on the flop, or call with a draw on the flop and give up when they miss.
It's also easy to profit by just playing tag, utilising the right range and right positional play, the key is discipline and control.
It's really all about your perceived Image and as stated above individual players and situations
if your on a strong site like pokerstars
your going to get a respectable level of poker.
Theirs no harm in thinking outside the box and exploiting exploits, once you know whats up and who's trying to do what to you