~ You are lucky because they credited the bonuses that you have missed. By the way, if you don't find anything in the email, it is usually announced in the telegram and the closest event is Chinese New Year celebrations.
As 'panjul07' has already explained above, it was a personal bonus (exclusive). Shuffle promotional team had sent it to specific users. So, they didn't make any public announcement about it. For an unknown reason, I hadn't received the promotional email about this.
Anyway, Shuffle has sent the pre-monthly bonus as a single claimable amount. They haven't sent it as a 3 days reload like before. I have received $3 from it, and lost it instantly.
Well, that's a reasonable reason and at least we don't wonder anymore. Are you inactive in the last few weeks? so we can assume that it is their way to bring you to be active again, similar to the promotion offered by other casino. By the way I also got the same bonus as you $3 and lost everything, I hunt for high multiplier in inhouse games yeah I hit the x500 multiplier on Keno game but with a low amount. My weekly bonus is also very low less than $ 0.1 this means that Shuffle really does not apply the basic bonus to the VIP level it's pure based on house edge.