Hmmmm...Offers are alive & well in my ibotta gallery. I manually updated the app earlier today because it had not yet triggered automatically.
If I were in your shoes, I'd start by checking for app update. If App is up-to-date I would run a CLEAR CACHE.
Reboot often solves issues, too.
EDIT: I see others here have mentioned the same issue.
Hope it resolves quickly!
~ibotta.like.you.mean.it~
