Ok, got it! I believe the FSF points about selling software come from a time where you sold the medium (like floppy disks) with the software: you had to allow

Ok, got it! I believe the FSF points about selling software come from a time where you sold the medium (like floppy disks) with the software: you had to allow doing this because it was not practical to spread software without doing this and not costing (too much) to the author. I don't really think it's practical advice for the present, they were never really business model specialists.