What’s the point of the question?
Why not just say
The main policy is: be OSS
Or what is the difference between OSS and FOSS here?
I’ve said before IMO “Free” was a poor word choice
but what good does it do tacking the F onto OSS?
Not all the software at F-Droid is Free Software, but it is all OSS. So I think the acronym FOSS confuses.
I understand “FOSS” has been used at F-Droid since 2010 or 2011.