They actually don’t get the same time - the top three get time bonuses, with first place getting the largest bonus. (That doesn’t matter for these riders though, since neither has a chance of winning overall.) There are also points in the green jersey sprint competition at stake - the higher you place, the more points…

Everyone saying this is incorrect under the laws of the game is quoting from the old laws. The new (2016-17) laws specifically made a change for this situation: “If play is stopped [due to interference with play] and the interference was by a team official, substitute, substituted or sent off player, play restarts…