Rimbit Co Ltd, the company behind Rimbit, is running a successful crowdfunding campaign ($125,974 raised) at Indiegogo:
https://www.indiegogo.com/projects/next-evolution-in-digital-currency. They are currently offering a buyout opportunity to holders of YellowCoin.
Because you believe in the crypto currency idea, you – at some stage – had faith in YellowCoin. They hope that by exchanging your dead coin for Rimbit, your faith will also move over to Rimbit. Users are the most valuable asset to any crypto currency and its community, and it would be a shame if you were to lose interest in the crypto currency idea because of a poorly developed coin, when there are viable alternatives like Rimbit.
You should get in touch with them by posting at their forum:
http://rimbitforum.com