Yeah i think the BlackBerry Browser is dying slowly day by day...whenever i try to open those links with the browser it says can't resolve the hostname...on the other hand when i open with android browser link opens flawlessly..without a problem.
Security wise all it needs is a user registration feature. There is a good example of a public-run repository which has been a success - https://openrepos.net/ for Sailfish / Meego. There is a lot of interaction between the publishers and the users, and the trust develops implicitly as more and more users download, rate and comment on the apps. Some of which are not even fully open source.
For now, even if it's just user registration, we would be able to see that it is XcrazyS who uploaded his own apps and not someone else. That's good enough.
Same applies to the apps built from source by the non-original authors. Or closed source apps uploaded by someone else. You either trust the uploader or you don't.
Ultimately it should be either be a single person curating the whole catalog (like conite currently maintaining his list or XcrazyS his own) - or the community self regulating it through feedback.
This issue is resolved in latest update. To set a type you can simply select the file type BAR / APK / ZIP in the Upload/ Edit page
Most apps are in default ZIP value, you can change it by
Some App >> Edit Button >> Select correct type >> Save
