From Facebook today:
https://www.facebook.com/eRewardsUS/...WSFEED&fref=nf
Here at e-Rewards, we’ve been making some recent changes to improve the quality of our product. The first change was to sunset our mobile application, this is so we can focus on further improving our mobile web experience. The app is no longer supported, so please uninstall it from your device. We have also suspended a number of accounts that are either inactive or have inconsistent data, please contact us if you require help. Thank you for your patience, and we look forward to sharing what’s in store for the future very soon.