"Some casino gift shops sell basic strategy charts the size of a business card. However, these charts have at least one mistake about half the time."
A basic strategy depends on the exact rules of the game and these might be small or subtle mistakes, but they are there.
I assume you're talking about blackjack: unless there is a CSM at the table or an absurd 6:5 blackjack payout (you shouldn't be there in either event, period) you can absolutely play to your advantage.
But yeah, you might track cards (good luck doing that with 10 decks though)
In fact a higher number of decks can improve one's advantage when counting because when the count turns in your favor it can happen with more of the deck left to come (so a longer period of advantageous play)