I've had a lot of requests for a list of monthly casino bonuses, so, lo and behold, here you go. I'll keep it updated moving forward and add any new ones I find. If you know of other good monthly bonuses not listed, leave a comment and I'll add them to the list.
I know lots of poker folks still cast a dubious eye towards the casino bonuses in general, but they really can boost your poker bankroll, especially if you stick to the cashable ones and are disciplined enough to grind them out.
Cashable Monthly Casino Bonuses that Allow Blackjack
InterCasino: 100% up to 100, 2,500 WR
Littlewoods: £25 bonus added automatically after wagering £625
UKBetting: £25 bonus added automatically after wagering £500
BetFred: 25% up to £50, WR of 25x bonus + deposit ($7,500 for max bonus).
WillHill: 100% up to £25, £800 WR
32Red: 100% up to 50, 1500 WR (Note: to be elgibile you have to get an email from them offering the monthly bonus and then contact live support and get the bonus credited after depositing into your account.)
Betsson: 30% up to 30, 750 WR
Casino Euro: 30% up to 30, 750 WR
Cherry Casino: 30% up to 30, 750 WR
Omni Casino: $100 bonus after wagering $4,000, $8,000 WR if playing BJ
Eurobet: 50% up to 50, 800 WR (Note: you need a code to get this bonus and it changes each month, so check the site for the current code. Eurobet also recently banned US players.)
Cowboy Casino: 25% up to $200, 25x bonus+deposit WR
Casino.net: weekly 15% bonuses, 10x bonus+deposit WR (Bonus maximums depend on Players Club level, check site for details.)
Ritz Club: 100% up to £50, £2,000 WR (Ritz Club doesn't accept US players.)
BetDirect: 100% up to £25, £1250 WR, BJ allowed (Doesn't accept US players.)
SportsCafe offers a 100% up to 25 monthly bonus, with a WR of 25XD+B. Software is Boss Media, which is very, very slow, and you need a PIN that they snail mail to you before you can cash out. You also can't get the monthly bonus the very first month you sign up, just the signup bonus.
The next group all offer 100% up to $100 monthly bonuses. WR is 10x bonus+deposit, but blackjack, baccarat, and video poker only counts towards 1/6th of the wagering requirement. Table games in general count towards 1/2 of the WR, with slots counting 100%.
I haven't done these myself, so any experiences would be welcome. It might be best to play these as a semi-sticky bonus and to set a target to try to double up (or more) first, as you'll be giving back some profits when clearing the WR, whether you do it at BJ ($12,000 WR) or a lower HA table game like War or Pai Gow.
Cocoa Casino: 100% up to $100
DaVinci's Gold: 100% up to $100
Paradise8: 100% up to $100
This is Vegas: 100% up to $100
Sticky Monthly Casino Bonuses (If you don't know the difference between a sticky and cashable bonus, read this first. Some of the sites below allow blackjack, others do not, check site for current terms)
Acropolis: 100% up to $50
Europa: 100% up to $100
Casino del Rio: 50% up to $50
Hammer's Casino: 50% up to $50
Cameo Casino: 50% up to $50