The inverse perspective works too: An employer hires you. Then they come across more candidates. They continue interviewing for the same position. You then fin

The inverse perspective works too: An employer hires you. Then they come across more candidates. They continue interviewing for the same position. You then find out that they have been interviewing, your loyalty is shaken and you know that the employer can fire you within the trial period which makes the feeling worst. New applicants will not know that the position was filled and get formally rejected if they are not significantly better than you. If they do find out about position being pre-filled, they'll resent the employer for continuing to interview them. Please note that employment culture is very different in many companies and to not take things for granted. Look at Steve Yeegee's recent post regarding Amazon vs Google.