They wrote that they're the owners of the trademark (with scans of some documents attached) and that they haven't released a330 yet thus it is fake:
This topic belongs to rumor mill.
There this page has already been discussed.
They do not say it is FAKE.
They say that the "dingoo a330" violates their trademark of dingoo.
But there is no "dingoo a330" ... it is the "a330 mini game king" (or something similar)
This would be in line with the dingoo.hk story, that nearly the complete old staff left, and started the new company.
So the old company has the trademark for the name, and the new company has all the know how.
IF it is so, than it is strange that dingoo tech STILL has not released a specialized A330 firmware!
But than again the dingoo tech a320 replacement has also NOT materialized!