Nelle loro FAQ c'è scritto:
Apps do not need to be open-source to be submitted to Accrescent. Although open-source software provides additional transparency and can make it easier for users to check overall code quality, it is not inherently more secure or private than closed-source software. Likewise, proprietary software is not inherently less secure or private than open-source software. Since Accrescent is focused on security and privacy it wouldn't make sense for it to restrict developers to a specific source model.
Questo punto è controverso e discutibile secondo me.