It is the risk that bounty hunters take and they have to live with it. The project looks promising and it will be interesting to watch progress. If you are correct then it will be bad for the project trust.
It is not about being promising but about getting things done, besides, i don't really see what is promising about the project even though they claim it is the first ever crypto app store, i am sure there has been others before them who where unable to succeed,
i can't say it is promising because there hasn't been much update regarding the app, project like this can be difficult because you have to create a better platform that can really provide this service, you have to be able to attract app dev to come an list their app on the platform and so forth, lots of work to be done, i hope the dev are working seriously behind the scene.