USE the count? Typically no, unless you're betting very small and consistently.
Basically, the way to annoy them and either get kicked out or only allowed to flat bet is to vary your bet size with the count (E.g. bet a lot when the count is favorable, and the table minimum otherwise). That's the only way to really make money counting. Much easier to detect these days with the eye in the sky.
You can use the count to inform certain decisions that lower the house edge a bit, but typically not enough to actually be +EV. For instance, insurance is normally a very bad bet, but at certain counts it becomes +EV, but not +EV as a whole to make it worth...having to play blackjack.
If you use he high low system it's a +EV bet to take insurance when the count is +3. At that point the probability is greater than 1/3 that the dealer has a 10.
USE the count? Typically no, unless you're betting very small and consistently.
Basically, the way to annoy them and either get kicked out or only allowed to flat bet is to vary your bet size with the count (E.g. bet a lot when the count is favorable, and the table minimum otherwise). That's the only way to really make money counting. Much easier to detect these days with the eye in the sky.
You can use the count to inform certain decisions that lower the house edge a bit, but typically not enough to actually be +EV. For instance, insurance is normally a very bad bet, but at certain counts it becomes +EV, but not +EV as a whole to make it worth...having to play blackjack.