For some reason I got that email as well, even though I am an active player. I won't say not to it of course but it's strange they call it welcome back when I am not inactive.
It seem like they sent the mail to accounts that have gotten to a certain level - for example from level 8 above because I still have some XP left before I reach there and I didn’t receive any mail. (Justice for low level accounts. lol)
Thumbs up to BC for this one, even thought it's just a tiny gesture.
I think it is really about playing back to bc.game that's why it is called welcome back bonus for reason. Also I think it is not about what's your VIP level since I'm only VIP 5 and received the welcome back bonus. Maybe there's a timeframe on how long you didn't play in bc.game or they the have information that we are playing to other casino that's why they gave them this bonus.