Online gambling sites are supposed to incorporate Random Number Generators but I think tons of sites aren't regulated yet. I've seen/experienced sessions where the dealer gets 17 to 21, ten to twenty times in a row. How can your capital play through that unless you're just playing small like $ 1.00 per hand ? ? UGH !
But there are times I'm playing and I do sense the site is legit. Example, I'm going to Lost Wages next week and I haven't played BJ for 4 years, so I put $ 100 into my DK casino site to get some basic strategy practice. The dealer did take 10 hands from me straight, but I did win 15 in a row playing $1.00 per hand. Luck or AI at work here ? Just play small and you can't get hurt ! My fav gambling quote is from Matt Damon, Rounders,
"you can't lose what you don't put into the middle ! "