I just asked support of Club World. Yes, the "over 7k" is already the combined value
Club World spams me several times a week with really crappy slot bonuses coupons (35% max, often just 25%) with a
MAX CASHOUT (2000$).
So players can be playing with slot bonuses all the time and this is the 'catch'.
When the jackpots now are much higher than the 2000$ max cash-out, the casino can keep more of these jackpots money themself.
Before the jackpots was combined each slot jackpot started at 1000$ and normally got hit on 2.5k$ in average. So players often got away with the jackpot money. Now it is the casino that 'hits the jackpots' actually.
The whole problem here with the bonus is the max cashout restriction. It increases house edge much more that people think when you are playing slots. So instead of maybe 92% payout slots (I am not optimistic with RTG slots), you are effectively playing maybe a 88% slots because you can not win much of the jackpot. Of course you could play the old slots with no jackpots, but nobody does that since all the fun video slots at RTG are jackpot slots.
A 25% slot bonus is better than no bonus.
But a 25% bonus with a maximum cashout bonus is worse than no bonus at all for these slots!
Anyway, this is my theory about club world combining the jackpots.
So I suggest you play at accredited RTG casino with no max-cashout for bonuses.