~snip~ I received this kind of reload bonus several times, I think 3-4 times this year. Not sure how the determine this reload bonus but it is always nice to get a surprise reload like this while I do not expect to get it.
Most probably this reload bonus is related to the VIP rank-up and account activity. I have also received an exclusive reload bonus like this from Shuffle in the past. The first time I received it in the
January month of this year, then I got it again on the
March month. I haven't received any exclusive bonus like that for the 3rd time as I have become inactive at Shuffle. They want to keep the VIP players active with these surprise bonuses.