No such thing random, there are 4 types promotions or bonuses you get.
- Depends on the waggering (high waggering): These lead you to get bonus VIP ladder
- Depends on the activity: Which is like only for sporbet are mostly trigered 5-10$ or casino but these one is rare
- Depends on special days: Mostly these to everyone
- Depends on less activity: These one is kinda new cause we speculation due the less activity

One important things from Stake, they never give promotion to active member ~LOL. You can ask everyone, no matter how much deposit you're made.

Perhaps these ?