This is really quite easy. One popular recruit thread on another general gaming community (where clan recruiting is allowed), for example, can potentially get you multiple emblems. This is probably a temporary source of emblems due to the ease of doing this.
... But if you ever wanted SeeD Emblems, this is an easy way to do it. And you're helping SeeD's activity in the process.

Also... If you can get an older member to return (someone who hasn't posted in at least five months), he/she can count as one of the three automatically. Remember, this is probably temporary, so now is the best time to recruit.
