If he wants to give us more, he can, but he doesn't have to. If you're unsatisfied with what he's given us, that's pretty much your problem, not his.
Obviously he don't have to tell us or release anything.
I see 3 possible situation here :
1/ This is just a big fake.
2/ This is not a fake, and the x-cubes cube will be released. In this case, some informations about the release process would be apreciated in order to take this seriously. These informations are not critical and will not help anybody to make copy.
3/ This is not a fake, and xb27 don't want to release anything. In this case, I maintain he is acting like an
attention whore. (this is also the case for case 1/ in fact).
EDIT: This is true that he don't have to. By « he should » I meant « he should if he wanna be taken seriously ».
I don't know the video you are talking about. But This is a different case anyway. In the video case, it take a long time de do things again. In this case this is just saying something like « I have made some prototype, and think the industrial production will begin in about a year » or « I do not plan to release any of these cube because I don't want to », or anything that is taking less than a minute, and
do reveal critical informations.