the reason they can't publish is because their editor won't sign off on it. the reason he won't sign off is because the sourcing is not 150% air tight.
they are sitting on all these stories pending further corroboration of the story, more evidence, more details, an on-the-record interview etc.
a lot of this stuff WILL come out, but as i've said before, the story has to be absolutely bullet-proof.
look at the Bruno Bellissimo story for the kind of info that has to be in there for these things to get the go-ahead.
any story that gets published at this point has to pass an insanely high bar for the Globe or Star to dive into the toxic maelstrom that is Rob Fraud.
the Sun seems to be following its own path here--not sure what their end game is.