Only bother going OSF if you plan to open for friends/clanmantes/wc. If youre thinking of pure spy for war, thats another question. Its good, in that you can go to sleep without fear of losing much, but you should have no allies.
I think you mean hansel? These days theres almost no point in going OSF because 1) no one needs an OSF when haunting pays better 2) growth is slow since the end of pwars and without the extra 500m a haunting unload you're growing slower than all Hansel. Youre still small and have the choice of going hansel or not, I would take the chance and do it. The build is rather overpowered in my opinion.
@FriendWithBenefits, the term "OSF" is fairly obsolete now that plunder wars are gone and you'll see many opinions on your question. For me, I typically am hansel out of war (while in growing mode) but during war I'll convert back to pure spy. There are many reasons for going pure spy particularly if you know how to use the build correctly. But, remember, whatever build you choose is a PERSONAL decision. Research it a bit more, ask your friends and clanmates (I see you're in Tyr and there is a plethora of experience there). @-Senorita- it's a given that pure spies have no allies. What a stupid error to make and well deserving of being taken advantage of / stripped in my opinion. ~ Tara