Whilst this is an interesting discussion about rake, if you look at the title I was talking about SnGs.
I have noticed from the leaderboard on Sharkscope that the biggest earners tend to play high limit heads up sngs so I fancied giving it a try. For example the leader on sharkscope only has an 8% ROI but as he has invested over $3,000,000

he has made over $240,000.

He tends to play a lot of $1000 or $2000 + heads up SnGs.
I'm finding that you can play loads of them and therefore get your investment up quickly which I think is the key to winning on-line.
I have currently played 20 $33 ones and won 12 for a $60 profit. Mind you I have been hitting a lot of flops! I think I'll give that "play opposite to the other guy" technique a try tonight.
Any other suggestions????