I would say that it is almost impossible to return the reputation, especially in the cryptocurrency community. They don't forgive mistakes here ...
Many projects even do not try to return the reputation. They simple takes money after IEO and stop developing.
It is precisely because of such projects that investors' confidence in new projects has lost, unfortunately.
In DPoS mining to start mining first it is necessary to buy tokens to stake and only after that stake tokens to get profit from mining. And how you will sell mined tokens if there is no listing on the exchanges?