Yeah, I’ve looked into this before, and it’s way harder online than in a real casino. Most online games use continuous shuffling, which makes counting pretty much useless. The only way it might work is in live dealer blackjack, where they use real cards and don’t shuffle after every hand. I tried it once, but keeping count while also playing was way trickier than I expected. If you’re really into blackjack, I’d recommend checking out
https://bchonlinecasino.com/ site—they’ve got some solid info on crypto casinos with good blackjack options. Might be worth a look if you’re trying to find games with decent rules.