Well you see there is a difference. I have no problem with anyone using Open Source code, but using it and then claiming all work to be yours, that is not correct. In Android, if an OEM decides to use Android they have to state that the phone they sell utilizes Android.
dminer69, has neither said nor given credit to the fact that XCloudcoin is wholly based on ownCloud. I wonder if the "angel investors" know about this. Finally, as you said, this is something new, but innovative? Hardly.
But you are assuming the terms and conditions of ownCloud requires anyone using the platform to disclose it is based on ownCloud. That is like someone using PHP and disclose their website was developed in PHP. No one does that. As a standalone product it might not be innovative, but being re-purposed for crypto it is innovative.