Lucky for you. IIRC when I’m on your rank I got this bonus when my experience is around 70% to 80% on that range but I believe I received that same bonus when I wager a huge percentage on a short period of time like 10% in few days.
I’m not sure how do you wager recently but I remember I always received that bonus when I’m wagering huge while my experience is already near to rank up.
That’s a sweet bonus.
It's true that recently I've been more active playing casinos/slots but my playing style is the same as usual the different one is I deposit with my own budget while previously I used the budget from sig campaign. 2 users from this forum confirmed that this bonus was triggered due to their gambling activity increase well, this could be a note.
I think I got this since I played like crazy last week/month, hence wagered more than usual. Maybe a 5%-10% gauge filled in a week/month will trigger this? Or perhaps if the cumulative gauge filled 40%-50% (mine was 42%).
Well, your experience is almost the same as mine but maybe there are other criteria that we don't know, some of my friends also did the same thing but there no bonus offer/VIP Ladder. I suspect VIP progress is also one of the reasons for example 40%-50% towards new VIP level.