That is the first of the four monthly bonuses. There are other bonuses that pop up. There is usually a Mid-week bonus and then a weekend bonus. Unfortunately, not everyone gets them.
There are also bonuses for buying specific items in multiple shopping trips.
You can see all the bonuses in the Earn More tab in the Ibotta app.
I am not sure what hype you are referring to.
I save approximately $150 a month with Ibotta. Add in other apps and coupons, and the number is probably over $200 a month.
For me, it is worth it.