I think it all depends on what your goal is. If you find a really badass male, like Bodhi's 88G13HP or Duke Diamond's (Skelly Hashplant X SSSC Skunk 1) then you could use him for a bunch of f1s and keep him.
If he's not that great, maybe you could find a better male in your f2s.
So if I bought a pack of Goji OG let's say from Bodhi, I might select one male and cross him to other females to make new f1s. Then if I determine the male is not that great for future pollen chucks, I could sort through the f1 beans and try to find a better male for whatever goal I have (male the offspring shorter/taller, yield better, etc.).
Just my opinion, hope it helps