I have seen almost all of the ICO's going for ANN thread first and announcing BOUNTY later at least after a week. But some have gone for bounty first and ANN later. Is it necessary to announce ANN first or is it some kind of strategy?
ANN thread is more important than the bounty thread so it will always come first. If the project does not have an ANN thread, where will you get your updates from here? So bounty is always an option in most projects