Does the text suggest that the concepts of 'Kamya' and 'Nishkam' service are direct equivalents to 'shraddha' (faith) and 'saburi' (patience)?

No, the provided text from Chapter 0 makes no connection, direct or indirect, between Kamya/Nishkam service and the concepts of shraddha/saburi. The terms 'shraddha' and 'saburi' do not appear in the source material at all. The text clearly defines Kamya service as studying spiritual texts for worldly prosperity or the removal of worries, while Nishkam service is for achieving liberation from the cycle of birth and death. This distinction, as explained in Chapter 0, is about the devotee's motivation for service, not an exploration of principles like faith or patience.