[rhizome]

[ QUOTE ]
2/4 is raked twice as heavily as 1/2 there so don't play that game, not sure about the higher limits there though.

[/ QUOTE ]

This is odd.
The main difference is that at 1/2, the rake is capped at $2. At 2/4, it is capped at $3.
According to my PT stats, rake at 2/4 6 max is 4.28% of the pot. Whereas, it is only 3.73% of the pot at 1/2 6 max.

Here is the schedule from their website.
$1.00/$2.00 2 or more $0.25 for each $5.00 in pot, maximum $2.00
$2.00/$4.00 2 $0.25 for each $5.00 in pot, maximum $1.00
$2.00/$4.00 3 to 4 $0.25 for each $5.00 in pot, maximum $2.00
$2.00/$4.00 5 or more $0.25 for each $5.00 in pot, maximum $3.00

FWIW, I've actually found better games at 2/4 and 3/6. The main problem for me is that they tend to break up rather quickly.