Having traveled playing since 1992 in over 60 countries, I played many blackjack havens. I share my past experience and hopefully, fellow APs would also share theirs here or on Green Chip because these were part of blackjack history. My experiences were mostly non-USA but there were some in the US. Unfortunately, all the loopholes have long been closed.
Casinos offered a good rebate for blackjack players. A blackjack player who brought $30,000 to casinos over a weekend playing 12 hours betting minimum $400 got fully comps on airfares, hotel, and food plus $2,100 rebate. Since the games were about -0.1% to -0.2% basic EV, basic strategy players could get about $1,300 average flat betting after rebate. I arranged puppet players on the program, making about $600,000 in commissions.
Russia 1996 to 2003
Hundreds of casinos offered +0.5 to 1% basic EV games with rules such as full Early Surrender and 2 to 1 same suit blackjacks.
Casinos couldn't bar counters. A team won $35,000,000 during the period.
Casinos offered chips rolling rebate on blackjack up to 1.5% allowing basic strategy players making 0.3 to 0.5% playing against CSMs. A team took HK$5.2 Million in 6 weeks from a casino on CSM HK$20,000 max table.
A casino offered a sequential trackable game for 4 years until 2011. Two casinos offered a baccarat video game allowing players doubling after seeing one card every 20 hands in 2008.
A casino offered 1% positive off-the-top games for years and reported subtly at Jesse May's Gambler's Guide to the World. I went playing after the book been published for a half year. The game was offered for years after being reported.
A casino offered 2 to 1 any blackjack. Another casino offered 10 to 1 on baccarat tie and full ES on BJ promotion.
Government-owned casinos couldn't bar counters, allowing hundreds of counters making money until most casinos being privatized and used CSMs.
A casino offered $2,300 rebate plus two nights hotel for a player bought $30,000 junket chips playing baccarat. A team took about $3,000,000 in a year.
A casino offered one card exposed baccarat and $1.2 M was taken in 4 months.
A casino offered 1.4% chips rolling rebate on blackjack. A team took $1,000,000 in 8 months.
HK Cruise 2007
An HK cruise offered 1.5% chips rolling rebate on CSM blackjack with a max bet of HK$3,000 allowing BJT to win 1.04 Million HK$ in a month.
United States 2011