This is all ludicrous (if you don't like Dero, don't buy it; let people make their own decisions and take responsibility for them; and stop repeating tired FUD tropes!), and I don't know why I'm feeding the trolls, but...
Do you need the source code of your bank before you can have expectations of how it works?
Ok comparing Dero to federal licensed and insured banks is bordering on stupidity.
This misses the point. The point is that you don't need their source code in order to trust the system (decentralized or not). The thing you need is the protocol. Almost all of what you need to write your own node software is public (and with the recent leak, you could easily figure out the rest). CryptoNote guarantees that no unmined coins were created, or double-spent, and so if you can validate the blockchain, then you can be confident that none of this bizarre FUD holds water.
There is absolutely no evidence that Dero is a "scam". It would be a truly bizarre kind of scam if there were.