When you post a job on Get on Board and you still haven't purchased a publication or a subscription plan, your job will get applicants, but you won't be able to access all of their contact information. In this case, the job is "locked".
Before purchasing a publication or a plan, you can see a preview of each candidate's application, where you see basic information about their professional experience and academic background.
This preview has enough amount of information so you can assess how suitable an applicant is for a job, and decide if the quantity and quality of applicants that you get through Get on Board make it worth purchasing a publication.