Hi, Moneedude –
It's a great post, which many have read, but maybe it's a bit too complex for some casual visitors to digest.
Please keep in mind that the forum, so far, is only open experimentally and doesn't enjoy heavy traffic. Poker1.com, itself, is only open for testing. However, early visitors are appreciated, as long as they understand much of the functionality is still pending and that there may be many other glitches.
Okay, now…
A $6 rake (with or without a $1 tip) is way too high for a $30 pot. Unless "called" pots average $100, or close to it, it's unlikely that such games can be beat by most skillful players. It's possible that they can be, but that rake certainly makes earning a consistent income difficult.
It might even border on impossible.
When I say "called" pot, I mean that a bet is made and called before that portion of the wagering is subject to rake. That's almost always the case. It means that in your $4/$8 game with a full kill (mandatory double by the last winner), there will always be over $30 before the flop. That's the larger of the two limits you usually play, but the same is essentially true of the $3/$6 game.
The good news is that it sounds like the game you're describing has so many weak players competing for a typical pot that the average pot size is much greater than $100. So, in that case, you have a reasonable chance at winning, even though the rake is still too high. At 32 hands an hour (your estimate), with nine players per pot on average, the tax is around $26 average per hour, per player.
Some of this is theoretically returned by jackpots.
Regardless, that's way too high and it means that during a 10-hour session, over $2,000 will disappear from the players. That's a lot for nine players to absorb. So, I assume the turnover in the game is quite high and players leave frequently, often broke.
Should you move up with your limited bankroll? That was your question, and it's a good one. I'm not sure. Only you can decide.
Be prepared to go broke, even at the stakes you're playing now. But, if you can handle that possibility, then the rake will take up a smaller percent of your wagers as the stakes rise. That theoretically makes larger games more beatable, but those games also might have stronger competition, negating the benefit.
It's up to you. I would need to actually see the games to even attempt to advise you. And, even then, the decision is really your own.
Sorry I can't be more helpful this time.
Straight Flushes,
Mike Caro