This is very old technique and these days you can not make big money with this. House will catch you and will ban you from their casino. Even you will end up beaten by them badly.
I think iit works better in online casinos because there is nothing the house can do.
It's easier for them to ban you online than in a physical casino.
This is not an easy strategy on Blackjack and you must be very professional for you not to get caught. This is consider as illegal by casinos and the gambling site so if you don't want to get caught better not to try it and just enjoy the game, don't be greedy to win against the house, because its hard to beat them.