I have gotten the choice bonuses in March and April. April's choices were two $5 bonuses and my choice was when I got them. I blew it with the first one because I was recuperating from a nagging illness and my sister visited. Oh well. But I aced the second one along with the $1 mwmm. I think I got a text and/or an email telling me I have the monthly rising star bonus options. I clicked on the msg and it brings up the options. But come to think of it, if you scroll down the Ibotta home screen, the same msg is there as well. There may be several msgs that you can see by swiping left. Anyway, hope this helps.
Based on the past few months the 2 money bonuses are offered at the beginning of the month and the 2 product bonuses are offered mid month. All 4 have already been offered this month but there will be new ones next month.
hope this helps.