So with my routine playing slots at Bc game, I didn't feel that my Vip account had reached vip 8 or would soon reach Vip 9. Slowly but surely I will pursue a high vip to be able to get lots of bonuses.

I envy you for your imagination. Even at high levels the bonuses are not good, trust me. I am VIP 59 now and monthly for example is 0.02% of your wager. Meaning when you wager 10000$ you will get 2$ monthly bonus, of which you can claim half of it instantly and the rest goes to the "bank" and you can claim it in micro transactions over the next days. If you don't claim it in time (24 hours) it's basically forfeited. Weekly is like 0.06% of the wager, also tiny and the bank situation is the same.
So don't expect much because there isn't a lot to look forward to, straight up facts.
It seems like I have to bury my hopes of chasing VIP after hearing the explanation you have outlined. That's a very small amount to imagine, if this is the case then there are no more targets that I will pursue in the bc game other than just looking for fun in playing slots.
I thought we could get bigger bonuses at higher VIP levels but in fact it's not like that.
It turns out that you have been playing on the bc game site for a long time, I salute you, are you also a slot player or do you prefer to gamble on soccer betting.