I can think of more deserving places for that kind of bankroll than Casino Rewards
Casino Rewards are just as likely to make up obscure bonus rules as many Playtech casinos. Once you become a VIP though, they are far less likely to try anything on, other than through incompetence.
For the following:-
1) Buying goods with comp points.
Casino Action (little known option), but VIP's do not get a good deal because they can convert to cash with up to a 4x multiplier, but do not get the same 4x multiplier on the dollar value if purchasing goods.
Not much in the way of direct bonus offers, but much to be won on tournaments, however they suit slots players, not table game players.
BelleRock play earns both cashback points and auction points. Auction points can be used to bid for deposit bonuses, free spins, and free casino credits. The price paid depends on the demand for each item. Can also be offered weekend bonuses, which appear to reflect past activity. I once played through nearly 50K on slots during a scoreboard event, and was given a 100% up to 400 bonus the following weekend, well in excess of the usual 50% up to 50 or 25 that comes along.
2) The rest.
A) Jackpot Factory - Innovative promotions, some scoreboard based, and often including table games as well as slots. Would suit players with high turnover. Prizes up to $2500 for first place, often 4 events per month. Players who get a payout of more than $5000 and are in the VIP lounge get an entry into an "All Stars" tournament with prizes, and the top payout of all often wins something like a laptop.
VIP's also get entry to the VIP Lounge MG casino. Here, comp points are earned at double the normal rate, 2 per $10 wagered. This rate also applies to most table games, and is particularly suited to a player who likes to turn over large amounts on the tables. I believe a couple of games are excluded from reward points, one is Craps I believe.
Turning over $500,000 on Blackjack would earn 50,000 comps at the normal MG casinos in the group, but would be doubled to 100,000 points in the VIP Lounge, which would convert to a $1000 cashback, or 0.2% of turnover.
B) Fortune Lounge - VIP status is earned based on monthly playthrough, and someone turning over $500K+ per month will quickly reach Platinum, and stay there. Most promotions tend to involve great cruises, where participants compete for a big cash prize in a similar manner to B & M casino tournaments.
C) Palace Group - weekly promotions, either a deposit bonus, a slots losses cashback up to 40%, or a lucky draw with bonus credits as prizes. Newsletter tournaments run alongside these.
D) Grand Prive - start out lavishing HUGE bonuses, but you can be dropped from the list without any logical cause. They have moved away from cash based promotions now to event based ones, such as VIP Trips to big events (Grand Prix), Cruises & Holidays etc. There are also some cash prizes, but these are now distributed by the "lucky draw" method.
One negative point, like casino rewards, is that comps are redeemed as BONUS and not cash, and need to be wagered under the MG Bonus system, which can be a large amount for table games.
Something completely different.
32Red - A simpler approach, based not on loads of complicated promotions, but on levels of service. The few promotions that run tend to draw in high wagering players, winners of the scoreboard based events generally turn over 1Million or more on the qualifying games, which are likely to include both slots and table games. Top prizes have gone up as far as $6000, but are generally lower, with quite a few places receiving something.
VIP (Club Rouge) is by invitation only, and it is more than playthrough, heavy deposits etc that are considered. Generally, the main "extra" is a monthly reload of $132 or $150, as against $32 to $50. Unlike the others, they do NOT use the "MG Bonus system".
Comps (Red Rubies) are awarded 1 per $10, except slots where it is 2 per $10 wagered. When cashed, they have a small 4x WR.
Many other MG casinos could well end up offering big bonuses to a player who turns over in excess of $500,000 per month, more particularly in the weeks & months immediately following their NOT turning over their usual $500,000
A good many will stop offering bonuses to players who end up ahead, but will offer bigger bonuses to those players who lose steadily. Slots players tend to be preferred, more profitable in the long term for the casino