Sonny said:
I would guess that the proper bet is pretty close to 3x regular bet since you’re playing against three separate dealer hands. .. but I think the difference would be small...
Well, if you're saying what I think you are saying, that's exactly what I was trying to warn anyone against doing exactly that.
It sounds to me like you are suggesting tripling, or close to tripling it, the same optimal bet you would have used had the game not been multi-action because you think you are playing 3 separate dealer hands. I guess you are but they are all at the same TC and each has the same EV as if you only played 1 hand like normal.
In effect you are ~tripling what used to be your optimal bet at that count and, if it was a fully-kelly bet, you would be overbetting for sure.
I mean it's not exactly the same, like you say, either of betting one hand or how you would change your optimal bet if you did spread to 3 hands in a normal game, but betting the same optimal bet on all 3 hands would be a pretty big mistake. Betting half of original optimal bet on all 3 and still getting 50% extra money out is what you want to do. It just works out that way when somebody figured it out. You know I didn't figure it out so you should feel alot better about it lol.
And, while not relevant here, I don't really see any reason at all to change strategy.