Or Purism could:
- spare themselves the (substantial!) burden associated with setting up and hosting a secure repo; and
- avoid duplicating others’ efforts,
by leaving to F-Droid the responsibility of maintaining an FSF-compliant mobile app repository.
(Perhaps Purism could also send some funding F-Droid’s way to help to ensure F-Droid’s sustainability. This is likely to be a more efficient use of funds than setting up a separate repo.)
Related thread: Waste of resources to ship your own OS?