A little story from my part that happened to me some weeks ago.
As you know stake is sending you a birthday mail ( if you did KYC level 2 ) with mostly a bonus of around 25$. So my birthday came around and I expected the same.
Once my VIP host came online she sent me a message with birthday wished and told me she sent a "little something" to my vault. When I checked it was a whopping 200$, nice right? I thought that would be it of course.
So after some hours I suddenly also got the official birthday email with yet another bonus, I thought that's the 25$ of course.
When I opened the link it was another 100$, which was more than surprising!!

Didn't expect to get as much as 300$ that day, maybe it's because I am platinum 6 now which is of course a quite decent VIP level. Anyway, for anybody that has a host, maybe it's worth asking when it's your birthday.
Ah and another thing, when it's your stake birthday (the day you opened your account) also shoot your host a message, they most likely have a bonus for you. Last year I got like 150$.