from what I'm seeing it looks like nobody can redeem Anything... is this app for real or is it a scam?

Hello,
Thank you for reaching out to Yahoo Play. I understand your having trouble redeeming points. I will be happy to help you with this.
In order to redeem your points you must be signed into the correct ID on the app when you go to redeem. As long as you have an email on file you should be able to redeem without issue. If your email is missing you should be able to add it from the app settings. If you are having trouble adding the email, that can normally be solved with App troubleshooting. I have included some links below, you will see both IOS and Android troubleshooting, please follow the appropriate guide.
IOS troubleshooting:
http://help.yahoo.com/kb/index?page=content&id=SLN14676&locale=en_US&y=PROD_PLAY_IOS
Android troubleshooting:
http://help.yahoo.com/kb/index?page=content&id=SLN14699&locale=en_US&y=PROD_PLAY_ANDROID
If you have any questions or comments please let us know.
Best,
Yahoo Play