It's for Jaipur which which is the main crowd puller and can provide high end travellers and Ajmer is just an extention. It all alternate to DD and aimed at day return business travelers. Just imagine what work you can perform in day if dep is at 1300 in major metro where commuting itself will take an hour from different locations. I have checked and posted occupancy from Ajmer of Shatabdi and its 200-300 per day while rest 800-900 are from Jaipur.