It is maybe a general trend as my monthly bonus is around 30% lower as what I normally have. My game play is always not a lot and I only play in-house games or place some bets in the sportsbook when they offer a good promotion.
Or maybe there was a change recently like what dewi mentioned, I also didn't bet throughout and only became active in the last few weeks but I did lose more than usual so I was looking forward to a decent reward at the very least. My monthly was so underwhelming that I think it's much lower than the post monthly I got last month.