So you are absolutely correct in this case and players should not feel disappointed if they will not get as what they got before because there is no standard here.
Stake some time do something out of the box so we may get different thing every year, I wont hope too much for 2 monthly bonuses but maybe I'll be hoping something better for Christmas celebration on Stake.
The quest for the past 3-5 years, it's stake sharing 2 monthly on (December) ? I know the bonus drop based on wagering is always happening on December for Christmast Events (and always increases for the swaggering amount claimed each days). If they give 2 monthly for every year.
People will having higher expectation stake sharing 2 monthly.
Remember, stake got bully by their member because sharing monthly or bonus quite late. Now, just imagine if they not sharing 2 monthly bonus. How much they're gonna to get such a harsh word in the social media and forum ~XD