I have joined, finished all task but all I get is RBB, not RBD. I have 220 RBB and can't earn or exchange for RBD. Also, the image from OP shows RBB (working) and RBD (paid) under the bonus, which is incorrect. Both, the page and the app, show RBB to RBB. I don't see a way to earn money without investing. Clearly it's not what the OP claims. If there is a way around it, please tell me. Or else, it smells like a scam.
P.S. After contacting them by using the chat, I finally got some RBD. It seems there was an issue with my account. Lets see if its fixed.