What jspill says is pretty much spot on. As edges get smaller and smaller, low rake is far more important than fish for the high volume player.
Sure the best scenario is a site full of fish and few sharks but this is never going to happen again and even if it does, it won't take long for the current status quo to return.
I would prefer to grind out a huge volume vs regs i have a small edge with low rake than have to bumhunt for fish in high rake games.
If i can win at 3bb/100 vs regs and have rake only take 1bb/100, i'd prefer that than winning 12bb/100 vs fish and have rake take 10bb/100. That fish is not going to be around for long and fish that bad are hard to replace. Weak regs with small loss rates are a dime a dozen and are far more likely to stick around. When they run out of money they can go and bumhunt the lower stakes and comeback again
I think tho the fact that jspill is a LHE player makes him more astute to this fact tho. The same is readily apparent when I play shortstacked or CAP NL games.
It is this very rake effect that makes 100NL CAP ridiculously difficult to beat at a decent winrate. (A very little known secret is that 200NL CAP is easier to beat than 100NL CAP, precisely due to the fact that the reduced rake is more important than the quality of players between these two stakes).
The reason non CAP or non LHE players won't realise it is because although edges in all forms of the game are rapidly decreasing, they are still big enough in 100bb poker to offset the rake by a significant amount. PLO, NL CAP and LHE however will no doubt be more likely to see the point jspill is trying to make.
I would hope you're playing on USD tables at Minted now.
If only they would create CAP tables i'd be playing there a lot more but despite numerous requests they haven't done anything so I just play there to practise some short handed / heads up full stack play, but nothing serious...