Hi,
sattitg!
Usually, The strategy with SB open limps is not used at micro and low stakes due to the high rake.
The rake is not paid if the action ended preflop (so-called "no flop - no drop"). But some rooms collect rake preflop.
Therefore, "the SB Open Raise only" strategy is considered standard and more profitable.
Also, at micro-low stakes, players don't protect their BB well, and we can make a profit already preflop.
We can open the same range as with BU (42-45%).
And expand it to 70-80% if the opponent in the BB has an exploitable:
- 3Bet BBvsSB <10%
- fold to steal BBvsSB >63% vs 3bb open
- fold to steal BBvsSB >57% vs 2.5bb open.
The open limp can be used at these stakes too.
Not from a GTO point of view, but as exploitation of passive players.